diff --git a/backend/src/main/java/io/metersphere/base/domain/TestCaseWithBLOBs.java b/backend/src/main/java/io/metersphere/base/domain/TestCaseWithBLOBs.java
index 8c58c01094..49fe510c41 100644
--- a/backend/src/main/java/io/metersphere/base/domain/TestCaseWithBLOBs.java
+++ b/backend/src/main/java/io/metersphere/base/domain/TestCaseWithBLOBs.java
@@ -1,17 +1,18 @@
 package io.metersphere.base.domain;
 
-import java.io.Serializable;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.ToString;
 
+import java.io.Serializable;
+
 @Data
 @EqualsAndHashCode(callSuper = true)
 @ToString(callSuper = true)
 public class TestCaseWithBLOBs extends TestCase implements Serializable {
     private String remark;
 
-    private String steps;
+    private String steps;   //与TestCaseExcelData里的属性名不一致，BeanUtils.copyBean()复制不了值，需要手动赋值
 
     private static final long serialVersionUID = 1L;
 }
\ No newline at end of file
diff --git a/backend/src/main/java/io/metersphere/excel/domain/ExcelResponse.java b/backend/src/main/java/io/metersphere/excel/domain/ExcelResponse.java
index d4cb6ce786..b47c168904 100644
--- a/backend/src/main/java/io/metersphere/excel/domain/ExcelResponse.java
+++ b/backend/src/main/java/io/metersphere/excel/domain/ExcelResponse.java
@@ -9,5 +9,7 @@ public class ExcelResponse<T> {
 
     private Boolean success;
     private List<ExcelErrData<T>> errList;
+    private Boolean isUpdated;  //是否有更新过用例
+
 
 }
diff --git a/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelData.java b/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelData.java
index 161486e0fc..099c9b462f 100644
--- a/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelData.java
+++ b/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelData.java
@@ -8,6 +8,8 @@ import lombok.Setter;
 @Setter
 public class TestCaseExcelData {
 
+    @ExcelIgnore
+    private Integer num;
     @ExcelIgnore
     private String name;
     @ExcelIgnore
diff --git a/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelDataCn.java b/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelDataCn.java
index 218a59e01e..6cc4b5fca4 100644
--- a/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelDataCn.java
+++ b/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelDataCn.java
@@ -13,6 +13,10 @@ import javax.validation.constraints.Pattern;
 @ColumnWidth(15)
 public class TestCaseExcelDataCn extends TestCaseExcelData {
 
+    @ExcelProperty("ID")
+    @NotRequired
+    private Integer num;
+
     @NotBlank(message = "{cannot_be_null}")
     @Length(max = 255)
     @ExcelProperty("用例名称")
diff --git a/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelDataTw.java b/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelDataTw.java
index d60c24fa2a..aeea86ca0f 100644
--- a/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelDataTw.java
+++ b/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelDataTw.java
@@ -13,6 +13,10 @@ import javax.validation.constraints.Pattern;
 @ColumnWidth(15)
 public class TestCaseExcelDataTw extends TestCaseExcelData {
 
+    @ExcelProperty("ID")
+    @NotRequired
+    private Integer num;
+
     @NotBlank(message = "{cannot_be_null}")
     @Length(max = 255)
     @ExcelProperty("用例名稱")
diff --git a/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelDataUs.java b/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelDataUs.java
index 6916c3a5ec..c56260b523 100644
--- a/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelDataUs.java
+++ b/backend/src/main/java/io/metersphere/excel/domain/TestCaseExcelDataUs.java
@@ -14,6 +14,10 @@ import javax.validation.constraints.Pattern;
 @ColumnWidth(15)
 public class TestCaseExcelDataUs extends TestCaseExcelData {
 
+    @ExcelProperty("ID")
+    @NotRequired
+    private Integer num;
+
     @NotBlank(message = "{cannot_be_null}")
     @Length(max = 255)
     @ExcelProperty("Name")
diff --git a/backend/src/main/java/io/metersphere/excel/listener/TestCaseDataListener.java b/backend/src/main/java/io/metersphere/excel/listener/TestCaseDataListener.java
index 9397a20ef9..ad588dc8cd 100644
--- a/backend/src/main/java/io/metersphere/excel/listener/TestCaseDataListener.java
+++ b/backend/src/main/java/io/metersphere/excel/listener/TestCaseDataListener.java
@@ -1,12 +1,16 @@
 package io.metersphere.excel.listener;
 
+import com.alibaba.excel.context.AnalysisContext;
 import com.alibaba.fastjson.JSONArray;
 import com.alibaba.fastjson.JSONObject;
 import io.metersphere.base.domain.TestCaseWithBLOBs;
 import io.metersphere.commons.constants.TestCaseConstants;
 import io.metersphere.commons.utils.BeanUtils;
 import io.metersphere.commons.utils.CommonBeanFactory;
+import io.metersphere.commons.utils.LogUtil;
+import io.metersphere.excel.domain.ExcelErrData;
 import io.metersphere.excel.domain.TestCaseExcelData;
+import io.metersphere.excel.utils.ExcelValidateHelper;
 import io.metersphere.i18n.Translator;
 import io.metersphere.track.service.TestCaseService;
 import org.apache.commons.lang3.StringUtils;
@@ -22,10 +26,18 @@ public class TestCaseDataListener extends EasyExcelListener<TestCaseExcelData> {
 
     private String projectId;
 
+    protected List<TestCaseExcelData> updateList = new ArrayList<>();  //存储待更新用例的集合
+
+    protected boolean isUpdated = false;  //判断是否更新过用例，将会传给前端
+
     Set<String> testCaseNames;
 
     Set<String> userIds;
 
+    public boolean isUpdated() {
+        return isUpdated;
+    }
+
     public TestCaseDataListener(Class clazz, String projectId, Set<String> testCaseNames, Set<String> userIds) {
         this.clazz = clazz;
         this.testCaseService = (TestCaseService) CommonBeanFactory.getBean("testCaseService");
@@ -39,12 +51,15 @@ public class TestCaseDataListener extends EasyExcelListener<TestCaseExcelData> {
         String nodePath = data.getNodePath();
         StringBuilder stringBuilder = new StringBuilder(errMsg);
 
+        //校验”所属模块"
         if (nodePath != null) {
             String[] nodes = nodePath.split("/");
+            //校验模块深度
             if (nodes.length > TestCaseConstants.MAX_NODE_DEPTH + 1) {
                 stringBuilder.append(Translator.get("test_case_node_level_tip") +
                         TestCaseConstants.MAX_NODE_DEPTH + Translator.get("test_case_node_level") + "; ");
             }
+            //模块名不能为空
             for (int i = 0; i < nodes.length; i++) {
                 if (i != 0 && StringUtils.equals(nodes[i].trim(), "")) {
                     stringBuilder.append(Translator.get("module_not_null") + "; ");
@@ -57,10 +72,39 @@ public class TestCaseDataListener extends EasyExcelListener<TestCaseExcelData> {
 //            stringBuilder.append(Translator.get("functional_method_tip") + "; ");
 //        }
 
+
+        //校验维护人
         if (!userIds.contains(data.getMaintainer())) {
             stringBuilder.append(Translator.get("user_not_exists") + "：" + data.getMaintainer() + "; ");
         }
 
+        /*
+        校验Excel中是否有ID
+            有的话校验ID是否已在当前项目中存在，存在则更新用例，
+            不存在则继续校验看是否重复，不重复则新建用例。
+         */
+        if (null != data.getNum()) {  //当前读取的数据有ID
+
+            if (null != testCaseService.checkIdExist(data.getNum(), projectId)) {  //该ID在当前项目中存在
+                //如果前面所经过的校验都没报错
+                if (StringUtils.isEmpty(stringBuilder)) {
+                    updateList.add(data);   //将当前数据存入更新列表
+                    stringBuilder.append("update_testcase");   //该信息用于在invoke方法中判断是否该更新用例
+                }
+                return stringBuilder.toString();
+            } else {
+                /*
+                该ID在当前数据库中不存在，应当继续校验用例是否重复,
+                在下面的校验过程中，num的值会被用于判断是否重复，所以应当先设置为null
+                 */
+                data.setNum(null);
+            }
+        }
+
+
+        /*
+        校验用例
+         */
         if (testCaseNames.contains(data.getName())) {
             TestCaseWithBLOBs testCase = new TestCaseWithBLOBs();
             BeanUtils.copyBean(testCase, data);
@@ -96,18 +140,27 @@ public class TestCaseDataListener extends EasyExcelListener<TestCaseExcelData> {
     @Override
     public void saveData() {
 
-        //无错误数据才插入数据
-        if (!errList.isEmpty()) {
+        //excel中用例都有错误时就返回，只要有用例可用于更新或者插入就不返回
+        if (!errList.isEmpty() && list.size() == 0 && updateList.size() == 0) {
             return;
         }
 
-        Collections.reverse(list);
+        if (!(list.size() == 0)){
+            Collections.reverse(list);  //因为saveImportData里面是先分配最大的ID，这个ID应该先发给list中最后的数据，所以要reverse
+            List<TestCaseWithBLOBs> result = list.stream()
+                    .map(item -> this.convert2TestCase(item))
+                    .collect(Collectors.toList());
+            testCaseService.saveImportData(result, projectId);
+        }
 
-        List<TestCaseWithBLOBs> result = list.stream()
-                .map(item -> this.convert2TestCase(item))
-                .collect(Collectors.toList());
-
-        testCaseService.saveImportData(result, projectId);
+        if (!(updateList.size() == 0)) {
+            List<TestCaseWithBLOBs> result2 = updateList.stream()
+                    .map(item -> this.convert2TestCaseForUpdate(item))
+                    .collect(Collectors.toList());
+            testCaseService.updateImportDataCarryId(result2, projectId);
+            this.isUpdated = true;
+            updateList.clear();
+        }
 
     }
 
@@ -131,6 +184,32 @@ public class TestCaseDataListener extends EasyExcelListener<TestCaseExcelData> {
         testCase.setNodePath(nodePath);
 
 
+        String steps = getSteps(data);
+        testCase.setSteps(steps);
+
+        return testCase;
+}
+
+    /**
+     * 将Excel中的数据对象转换为用于更新操作的用例数据对象，
+     * @param data
+     * @return
+     */
+    private TestCaseWithBLOBs convert2TestCaseForUpdate(TestCaseExcelData data) {
+        TestCaseWithBLOBs testCase = new TestCaseWithBLOBs();
+        BeanUtils.copyBean(testCase, data);
+        testCase.setProjectId(this.projectId);
+        testCase.setUpdateTime(System.currentTimeMillis());
+
+        String nodePath = data.getNodePath();
+        if (!nodePath.startsWith("/")) {
+            nodePath = "/" + nodePath;
+        }
+        if (nodePath.endsWith("/")) {
+            nodePath = nodePath.substring(0, nodePath.length() - 1);
+        }
+        testCase.setNodePath(nodePath);
+
         String steps = getSteps(data);
         testCase.setSteps(steps);
 
@@ -189,4 +268,38 @@ public class TestCaseDataListener extends EasyExcelListener<TestCaseExcelData> {
         return jsonArray.toJSONString();
     }
 
+    @Override
+    public void invoke(TestCaseExcelData testCaseExcelData, AnalysisContext analysisContext) {
+        String errMsg;
+        Integer rowIndex = analysisContext.readRowHolder().getRowIndex();
+        String updateMsg = "update_testcase";
+        try {
+            //根据excel数据实体中的javax.validation + 正则表达式来校验excel数据
+            errMsg = ExcelValidateHelper.validateEntity(testCaseExcelData);
+            //自定义校验规则
+            errMsg = validate(testCaseExcelData, errMsg);
+        } catch (NoSuchFieldException e) {
+            errMsg = Translator.get("parse_data_error");
+            LogUtil.error(e.getMessage(), e);
+        }
+
+        if (!StringUtils.isEmpty(errMsg)) {
+
+            //如果errMsg只有"update testcase"，说明用例待更新
+            if (!errMsg.equals(updateMsg)){
+                ExcelErrData excelErrData = new ExcelErrData(testCaseExcelData, rowIndex,
+                        Translator.get("number") + " " + rowIndex + " " + Translator.get("row") + Translator.get("error")
+                                + "：" + errMsg);
+
+                errList.add(excelErrData);
+            }
+        } else {
+            list.add(testCaseExcelData);
+        }
+
+        if (list.size() > BATCH_COUNT) {
+            saveData();
+            list.clear();
+        }
+    }
 }
diff --git a/backend/src/main/java/io/metersphere/track/service/TestCaseService.java b/backend/src/main/java/io/metersphere/track/service/TestCaseService.java
index 313901669b..1ed153236f 100644
--- a/backend/src/main/java/io/metersphere/track/service/TestCaseService.java
+++ b/backend/src/main/java/io/metersphere/track/service/TestCaseService.java
@@ -19,7 +19,6 @@ import io.metersphere.excel.domain.ExcelErrData;
 import io.metersphere.excel.domain.ExcelResponse;
 import io.metersphere.excel.domain.TestCaseExcelData;
 import io.metersphere.excel.domain.TestCaseExcelDataFactory;
-import io.metersphere.excel.listener.EasyExcelListener;
 import io.metersphere.excel.listener.TestCaseDataListener;
 import io.metersphere.excel.utils.EasyExcelExporter;
 import io.metersphere.i18n.Translator;
@@ -126,11 +125,26 @@ public class TestCaseService {
 
         // 全部字段值相同才判断为用例存在
         if (testCase != null) {
+
+            /*
+            例如对于“/模块5”，用户的输入可能为“模块5”或者“/模块5/”或者“模块5/”。
+            不这样处理的话，下面进行判断时就会用用户输入的错误格式进行判断，而模块名为“/模块5”、
+            “模块5”、“/模块5/”、“模块5/”时，它们应该被认为是同一个模块。
+            数据库存储的node_path都是“/模块5”这种格式的
+             */
+            String nodePath = testCase.getNodePath();
+            if (!nodePath.startsWith("/")) {
+                nodePath = "/" + nodePath;
+            }
+            if (nodePath.endsWith("/")) {
+                nodePath = nodePath.substring(0, nodePath.length() - 1);
+            }
+
             TestCaseExample example = new TestCaseExample();
             TestCaseExample.Criteria criteria = example.createCriteria();
             criteria.andNameEqualTo(testCase.getName())
                     .andProjectIdEqualTo(testCase.getProjectId())
-                    .andNodePathEqualTo(testCase.getNodePath())
+                    .andNodePathEqualTo(nodePath)
                     .andTypeEqualTo(testCase.getType())
                     .andMaintainerEqualTo(testCase.getMaintainer())
                     .andPriorityEqualTo(testCase.getPriority());
@@ -177,6 +191,26 @@ public class TestCaseService {
         return null;
     }
 
+    /**
+     * 根据id和pojectId查询id是否在数据库中存在。
+     * 在数据库中单id的话是可重复的,id与projectId的组合是唯一的
+     */
+    public Integer checkIdExist(Integer id, String projectId){
+        TestCaseExample example = new TestCaseExample();
+        TestCaseExample.Criteria criteria = example.createCriteria();
+        if (null != id) {
+            criteria.andNumEqualTo(id);
+            criteria.andProjectIdEqualTo(projectId);
+            long count = testCaseMapper.countByExample(example);    //查询是否有包含此ID的数据
+            if(count == 0){  //如果ID不存在
+                return null;
+            }else { //有对应ID的数据
+                return id;
+            }
+        }
+        return null;
+    }
+
     public int deleteTestCase(String testCaseId) {
         TestPlanTestCaseExample example = new TestPlanTestCaseExample();
         example.createCriteria().andCaseIdEqualTo(testCaseId);
@@ -286,6 +320,7 @@ public class TestCaseService {
     public ExcelResponse testCaseImport(MultipartFile multipartFile, String projectId, String userId) {
 
         ExcelResponse excelResponse = new ExcelResponse();
+        boolean isUpdated = false;  //判断是否更新了用例
         String currentWorkspaceId = SessionUtils.getCurrentWorkspaceId();
         QueryTestCaseRequest queryTestCaseRequest = new QueryTestCaseRequest();
         queryTestCaseRequest.setProjectId(projectId);
@@ -338,10 +373,15 @@ public class TestCaseService {
             Set<String> userIds = userRoleMapper.selectByExample(userRoleExample).stream().map(UserRole::getUserId).collect(Collectors.toSet());
 
             try {
+                //根据本地语言环境选择用哪种数据对象进行存放读取的数据
                 Class clazz = new TestCaseExcelDataFactory().getExcelDataByLocal();
-                EasyExcelListener easyExcelListener = new TestCaseDataListener(clazz, projectId, testCaseNames, userIds);
+
+                TestCaseDataListener easyExcelListener = new TestCaseDataListener(clazz, projectId, testCaseNames, userIds);
+                //读取excel数据
                 EasyExcelFactory.read(multipartFile.getInputStream(), clazz, easyExcelListener).sheet().doRead();
+
                 errList = easyExcelListener.getErrList();
+                isUpdated = easyExcelListener.isUpdated();
             } catch (Exception e) {
                 LogUtil.error(e.getMessage(), e);
                 MSException.throwException(e.getMessage());
@@ -352,6 +392,7 @@ public class TestCaseService {
         if (!errList.isEmpty()) {
             excelResponse.setSuccess(false);
             excelResponse.setErrList(errList);
+            excelResponse.setIsUpdated(isUpdated);
         } else {
             excelResponse.setSuccess(true);
         }
@@ -374,7 +415,7 @@ public class TestCaseService {
                 testcase.setSort(sort.getAndIncrement());
                 testcase.setNum(num.decrementAndGet());
                 testcase.setReviewStatus(TestCaseReviewStatus.Prepare.name());
-                mapper.insert(testcase);
+                    mapper.insert(testcase);
             });
         }
         sqlSession.flushStatements();
@@ -400,6 +441,43 @@ public class TestCaseService {
         sqlSession.flushStatements();
     }
 
+    /**
+     * 把Excel中带ID的数据更新到数据库
+     * @param testCases
+     * @param projectId
+     */
+    public void updateImportDataCarryId(List<TestCaseWithBLOBs> testCases, String projectId) {
+        Map<String, String> nodePathMap = testCaseNodeService.createNodeByTestCases(testCases, projectId);
+        SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.BATCH);
+        TestCaseMapper mapper = sqlSession.getMapper(TestCaseMapper.class);
+
+        /*
+        获取用例的“网页上所显示id”与“数据库ID”映射。
+         */
+        List<Integer> nums = testCases.stream()
+                .map(TestCase::getNum)
+                .collect(Collectors.toList());
+        TestCaseExample example = new TestCaseExample();
+        example.createCriteria().andNumIn(nums)
+                .andProjectIdEqualTo(projectId);
+        List<TestCase> testCasesList = testCaseMapper.selectByExample(example);
+        Map<Integer, String> numIdMap = testCasesList.stream()
+                .collect(Collectors.toMap(TestCase::getNum, TestCase::getId));
+
+
+        if (!testCases.isEmpty()) {
+            AtomicInteger sort = new AtomicInteger();
+            testCases.forEach(testcase -> {
+                testcase.setUpdateTime(System.currentTimeMillis());
+                testcase.setNodeId(nodePathMap.get(testcase.getNodePath()));
+                testcase.setSort(sort.getAndIncrement());
+                testcase.setId(numIdMap.get(testcase.getNum()));
+                mapper.updateByPrimaryKeySelective(testcase);
+            });
+        }
+        sqlSession.flushStatements();
+    }
+
 
     public void testCaseTemplateExport(HttpServletResponse response) {
         try {
@@ -510,6 +588,7 @@ public class TestCaseService {
         StringBuilder result = new StringBuilder("");
         TestCaseList.forEach(t -> {
             TestCaseExcelData data = new TestCaseExcelData();
+            data.setNum(t.getNum());
             data.setName(t.getName());
             data.setNodePath(t.getNodePath());
             data.setPriority(t.getPriority());
diff --git a/frontend/src/business/components/track/case/components/TestCaseImport.vue b/frontend/src/business/components/track/case/components/TestCaseImport.vue
index a82195348f..1410afc46f 100644
--- a/frontend/src/business/components/track/case/components/TestCaseImport.vue
+++ b/frontend/src/business/components/track/case/components/TestCaseImport.vue
@@ -126,7 +126,8 @@
         fileList: [],
         errList: [],
         xmindErrList: [],
-        isLoading: false
+        isLoading: false,
+        isUpdated: false
       }
     },
     methods: {
@@ -180,6 +181,12 @@
         this.fileList = [];
         this.errList = [];
         this.xmindErrList = [];
+
+        //通过excel导入更新过数据的话就刷新页面
+        if (this.isUpdated === true){
+          this.$emit("refreshAll");
+          this.isUpdated = false;
+        }
       },
       downloadTemplate() {
         this.$fileDownload('/test/case/export/template');
@@ -207,6 +214,7 @@
             this.$emit("refreshAll");
           } else {
             this.errList = res.errList;
+            this.isUpdated = res.isUpdated;
           }
           this.fileList = [];
         }, erro => {