diff --git a/backend/src/main/java/io/metersphere/commons/constants/FileType.java b/backend/src/main/java/io/metersphere/commons/constants/FileType.java
index 7fba285277..2e5dfb8acb 100644
--- a/backend/src/main/java/io/metersphere/commons/constants/FileType.java
+++ b/backend/src/main/java/io/metersphere/commons/constants/FileType.java
@@ -5,7 +5,7 @@ public enum FileType {
     JPG(".jpg"), PNG(".png"), JPEG(".jpeg"), DOC(".doc"),
     XLSX(".xlsx"), DOCX(".docx"), JAR(".jar"), JS(".js"), TXT(".txt"),
     P12(".p12"), JKS(".jks"), PFX(".pfx"),
-    DER(".der"), CER(".cer"), PEM(".pem"), CRT(".crt"),
+    DER(".der"), CER(".cer"), PEM(".pem"), CRT(".crt"), SIDE(".side")
     ;
 
     // 保存后缀
diff --git a/backend/src/main/java/io/metersphere/track/controller/TestCaseController.java b/backend/src/main/java/io/metersphere/track/controller/TestCaseController.java
index ed368f25f5..05fb14487b 100644
--- a/backend/src/main/java/io/metersphere/track/controller/TestCaseController.java
+++ b/backend/src/main/java/io/metersphere/track/controller/TestCaseController.java
@@ -43,6 +43,8 @@ import org.springframework.web.multipart.MultipartFile;
 import javax.annotation.Resource;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
 import java.util.List;
 import java.util.UUID;
 
@@ -360,7 +362,7 @@ public class TestCaseController {
         byte[] bytes = fileService.loadFileAsBytes(fileOperationRequest.getId());
         return ResponseEntity.ok()
                 .contentType(MediaType.parseMediaType("application/octet-stream"))
-                .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + fileOperationRequest.getName() + "\"")
+                .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + URLEncoder.encode(fileOperationRequest.getName(), StandardCharsets.UTF_8) + "\"")
                 .body(bytes);
     }
 
diff --git a/frontend/src/business/components/track/case/components/TestCaseEditOtherInfo.vue b/frontend/src/business/components/track/case/components/TestCaseEditOtherInfo.vue
index 2041452516..d0ffef3ddb 100644
--- a/frontend/src/business/components/track/case/components/TestCaseEditOtherInfo.vue
+++ b/frontend/src/business/components/track/case/components/TestCaseEditOtherInfo.vue
@@ -52,7 +52,7 @@
       <el-row>
         <el-col :span="20" :offset="1">
           <el-upload
-            accept=".jpg,.jpeg,.png,.xlsx,.doc,.pdf,.docx,.txt,.json,.jmx"
+            accept=".jpg,.jpeg,.png,.xlsx,.doc,.pdf,.docx,.txt,.json,.jmx,.side"
             action=""
             :show-file-list="false"
             :before-upload="beforeUpload"
diff --git a/frontend/src/i18n/en-US.js b/frontend/src/i18n/en-US.js
index 57441fc67a..1af61e9f17 100644
--- a/frontend/src/i18n/en-US.js
+++ b/frontend/src/i18n/en-US.js
@@ -2087,7 +2087,7 @@ export default {
       cancel_relevance_project: "Disassociating the project will also cancel the associated test cases under the project",
       img_loading_fail: "Image failed to load",
       pdf_loading_fail: "PDF loading failed",
-      upload_tip: "Only jpg, jpeg, png, docx, doc, pdf, xlsx, txt, json, jmx files can be uploaded",
+      upload_tip: "Only jpg, jpeg, png, docx, doc, pdf, xlsx, txt, json, jmx, side files can be uploaded",
       attachment: "Attachment",
       upload_time: "Upload Time",
       total: "Total Case",
diff --git a/frontend/src/i18n/zh-CN.js b/frontend/src/i18n/zh-CN.js
index 65606cf4f1..3a23bff949 100644
--- a/frontend/src/i18n/zh-CN.js
+++ b/frontend/src/i18n/zh-CN.js
@@ -2085,7 +2085,7 @@ export default {
       cancel_relevance_project: "取消项目关联会同时取消该项目下已关联的测试用例",
       img_loading_fail: "图片加载失败",
       pdf_loading_fail: "PDF加载失败",
-      upload_tip: "只能上传jpg、jpeg、png、docx、doc、pdf、xlsx、txt、json、jmx文件",
+      upload_tip: "只能上传jpg、jpeg、png、docx、doc、pdf、xlsx、txt、json、jmx、side文件",
       attachment: "附件",
       upload_time: "上传时间",
       total: "用例总数",
diff --git a/frontend/src/i18n/zh-TW.js b/frontend/src/i18n/zh-TW.js
index 5ea9cabdc0..64935c8f0c 100644
--- a/frontend/src/i18n/zh-TW.js
+++ b/frontend/src/i18n/zh-TW.js
@@ -2085,7 +2085,7 @@ export default {
       cancel_relevance_project: "取消項目關聯會同時取消該項目下已關聯的測試用例",
       img_loading_fail: "圖片加載失敗",
       pdf_loading_fail: "PDF加載失敗",
-      upload_tip: "只能上傳jpg、jpeg、png、docx、doc、pdf、xlsx、txt、json、jmx文件",
+      upload_tip: "只能上傳jpg、jpeg、png、docx、doc、pdf、xlsx、txt、json、jmx、side文件",
       attachment: "附件",
       upload_time: "上傳時間",
       total: "用例總數",