diff --git a/backend/services/case-management/src/main/java/io/metersphere/functional/service/FunctionalCaseAttachmentService.java b/backend/services/case-management/src/main/java/io/metersphere/functional/service/FunctionalCaseAttachmentService.java
index 3890878dc5..1e10eb1643 100644
--- a/backend/services/case-management/src/main/java/io/metersphere/functional/service/FunctionalCaseAttachmentService.java
+++ b/backend/services/case-management/src/main/java/io/metersphere/functional/service/FunctionalCaseAttachmentService.java
@@ -481,7 +481,7 @@ public class FunctionalCaseAttachmentService {
                     //图片文件自动生成预览图
                     byte[] file = defaultRepository.getFile(fileCopyRequest);
                     byte[] previewImg = TempFileUtils.compressPic(file);
-                    fileCopyRequest.setFolder(DefaultRepositoryDir.getFunctionalCasePreviewDir(projectId,caseId));
+                    fileCopyRequest.setFolder(DefaultRepositoryDir.getFunctionalCasePreviewDir(projectId,caseId)+ "/" + fileId);
                     fileCopyRequest.setStorage(StorageType.MINIO.toString());
                     fileService.upload(previewImg, fileCopyRequest);
                 }
diff --git a/backend/services/case-management/src/test/java/io/metersphere/functional/controller/FunctionalCaseAttachmentControllerTests.java b/backend/services/case-management/src/test/java/io/metersphere/functional/controller/FunctionalCaseAttachmentControllerTests.java
index 27f5f39546..1ac6b291e5 100644
--- a/backend/services/case-management/src/test/java/io/metersphere/functional/controller/FunctionalCaseAttachmentControllerTests.java
+++ b/backend/services/case-management/src/test/java/io/metersphere/functional/controller/FunctionalCaseAttachmentControllerTests.java
@@ -247,16 +247,16 @@ public class FunctionalCaseAttachmentControllerTests extends BaseTest {
         Assertions.assertTrue(StringUtils.isNotBlank(fileId));
         file = getNoNameMockMultipartFile();
         doUploadTempFileFalse(file);
-        functionalCaseAttachmentService.uploadMinioFile("TEST_FUNCTIONAL_CASE_ATTACHMENT_ID_1","WX_TEST_PROJECT_ID", List.of(fileId),"admin", CaseFileSourceType.CASE_COMMENT.toString());
+        functionalCaseAttachmentService.uploadMinioFile("TEST_FUNCTIONAL_CASE_ATTACHMENT_ID_1","WX_TEST_PROJECT_ID", List.of(fileId),"admin", CaseFileSourceType.CASE_DETAIL.toString());
         FunctionalCaseFileRequest request = new FunctionalCaseFileRequest();
         request.setProjectId("WX_TEST_PROJECT_ID");
         request.setLocal(true);
-        request.setFileId("fileId");
+        request.setFileId(fileId);
         request.setCaseId("TEST_FUNCTIONAL_CASE_ATTACHMENT_ID_1");
         MvcResult mvcResult = this.downloadFile(ATTACHMENT_PREVIEW_COMPRESSED_URL, request);
         Assertions.assertNotNull(mvcResult);
         FunctionalCaseAttachmentExample functionalCaseAttachmentExample = new FunctionalCaseAttachmentExample();
-        functionalCaseAttachmentExample.createCriteria().andCaseIdEqualTo("TEST_FUNCTIONAL_CASE_ATTACHMENT_ID_1").andFileIdEqualTo(fileId).andFileSourceEqualTo(CaseFileSourceType.CASE_COMMENT.toString());
+        functionalCaseAttachmentExample.createCriteria().andCaseIdEqualTo("TEST_FUNCTIONAL_CASE_ATTACHMENT_ID_1").andFileIdEqualTo(fileId).andFileSourceEqualTo(CaseFileSourceType.CASE_DETAIL.toString());
         List<FunctionalCaseAttachment> functionalCaseAttachments = functionalCaseAttachmentMapper.selectByExample(functionalCaseAttachmentExample);
         Assertions.assertTrue(CollectionUtils.isNotEmpty(functionalCaseAttachments));
         functionalCaseAttachmentService.uploadMinioFile("TEST_FUNCTIONAL_CASE_ATTACHMENT_ID_1","WX_TEST_PROJECT_ID",new ArrayList<>(),"admin", CaseFileSourceType.CASE_COMMENT.toString());