diff --git a/src/main/java/io/choerodon/test/manager/app/assembler/TestCaseAssembler.java b/src/main/java/io/choerodon/test/manager/app/assembler/TestCaseAssembler.java
index 7323a1aa..f4661cf3 100644
--- a/src/main/java/io/choerodon/test/manager/app/assembler/TestCaseAssembler.java
+++ b/src/main/java/io/choerodon/test/manager/app/assembler/TestCaseAssembler.java
@@ -14,6 +14,9 @@
 import org.springframework.stereotype.Component;
 import org.springframework.util.ObjectUtils;
 
+import org.hzero.boot.file.dto.FileDTO;
+import org.hzero.core.base.BaseConstants;
+import org.hzero.core.util.ResponseUtils;
 import io.choerodon.core.exception.CommonException;
 import io.choerodon.core.oauth.CustomUserDetails;
 import io.choerodon.mybatis.domain.AuditDomain;
@@ -29,10 +32,6 @@
 import io.choerodon.test.manager.infra.util.AttachmentUtils;
 import io.choerodon.test.manager.infra.util.IAttachmentPreviewInfoUtil;
 
-import org.hzero.boot.file.dto.FileDTO;
-import org.hzero.core.base.BaseConstants;
-import org.hzero.core.util.ResponseUtils;
-
 /**
  * @author zhaotianxin
  * @since 2019/11/22
@@ -68,8 +67,6 @@ public class TestCaseAssembler {
     private FileFeignClient fileFeignClient;
     @Autowired
     private ModelMapper modelMapper;
-    @Autowired
-    private AttachmentUtils attachmentUtils;
 
     private static final String TYPE = "CYCLE_CASE";
 
@@ -162,9 +159,9 @@ public TestCaseInfoVO dtoToInfoVO(TestCaseDTO testCaseDTO) {
         List<String> fileKeys = new ArrayList<>();
         if (CollectionUtils.isNotEmpty(attachment)) {
             Set<String> urls = attachment.stream().map(TestCaseAttachmentDTO::getUrl).collect(Collectors.toSet());
-            Map<String, String> stringStringMap = attachmentUtils.getFileKeys(urls);
+            Map<String, String> urlToFileKeyMap = AttachmentUtils.getFileKeys(urls);
             for (TestCaseAttachmentDTO testCaseAttachment : attachment) {
-                String fileKey = stringStringMap.get(testCaseAttachment.getUrl());
+                String fileKey = urlToFileKeyMap.get(testCaseAttachment.getUrl());
                 if (!ObjectUtils.isEmpty(fileKey)) {
                     testCaseAttachment.setFileKey(fileKey);
                     fileKeys.add(fileKey);
diff --git a/src/main/java/io/choerodon/test/manager/app/service/impl/TestCaseAttachmentServiceImpl.java b/src/main/java/io/choerodon/test/manager/app/service/impl/TestCaseAttachmentServiceImpl.java
index e30a51fa..267dba7d 100644
--- a/src/main/java/io/choerodon/test/manager/app/service/impl/TestCaseAttachmentServiceImpl.java
+++ b/src/main/java/io/choerodon/test/manager/app/service/impl/TestCaseAttachmentServiceImpl.java
@@ -16,6 +16,9 @@
 import org.springframework.web.multipart.MultipartFile;
 import org.springframework.web.multipart.MultipartHttpServletRequest;
 
+import org.hzero.boot.file.FileClient;
+import org.hzero.boot.file.dto.FileDTO;
+import org.hzero.core.util.ResponseUtils;
 import io.choerodon.core.exception.CommonException;
 import io.choerodon.core.oauth.CustomUserDetails;
 import io.choerodon.core.oauth.DetailsHelper;
@@ -42,10 +45,6 @@
 import io.choerodon.test.manager.infra.util.AttachmentUtils;
 import io.choerodon.test.manager.infra.util.IAttachmentPreviewInfoUtil;
 
-import org.hzero.boot.file.FileClient;
-import org.hzero.boot.file.dto.FileDTO;
-import org.hzero.core.util.ResponseUtils;
-
 /**
  * @author zhaotianxin
  * @since 2019/11/21
@@ -79,9 +78,6 @@ public class TestCaseAttachmentServiceImpl implements TestCaseAttachmentService
     private FilePathService filePathService;
     @Autowired
     private FileClient fileClient;
-    @Autowired
-    private AttachmentUtils attachmentUtils;
-
 
     @Override
     public TestCaseAttachmentDTO dealIssue(Long projectId, Long issueId, String fileName, String url) {
@@ -286,7 +282,7 @@ public TestCaseAttachmentDTO attachmentCombineUpload(Long projectId, TestCaseAtt
         String relativePath = filePathService.generateRelativePath(path);
         TestCaseAttachmentDTO attachment = dealIssue(projectId, caseId, fileName, relativePath);
         // 填充wps onlyOffice预览所需要的信息
-        String fileKey = attachmentUtils.getFileKey(attachment.getUrl());
+        String fileKey = AttachmentUtils.getFileKey(attachment.getUrl());
         attachment.setFileKey(fileKey);
         ProjectDTO project = remoteIamOperator.getProjectById(projectId);
         if (project != null && StringUtils.isNotBlank(fileKey)) {
diff --git a/src/main/java/io/choerodon/test/manager/app/service/impl/TestCycleCaseAttachmentRelServiceImpl.java b/src/main/java/io/choerodon/test/manager/app/service/impl/TestCycleCaseAttachmentRelServiceImpl.java
index 1bb7221c..a2780c6e 100644
--- a/src/main/java/io/choerodon/test/manager/app/service/impl/TestCycleCaseAttachmentRelServiceImpl.java
+++ b/src/main/java/io/choerodon/test/manager/app/service/impl/TestCycleCaseAttachmentRelServiceImpl.java
@@ -15,6 +15,8 @@
 import org.springframework.web.multipart.MultipartFile;
 import org.springframework.web.multipart.MultipartHttpServletRequest;
 
+import org.hzero.boot.file.dto.FileDTO;
+import org.hzero.core.util.ResponseUtils;
 import io.choerodon.core.exception.CommonException;
 import io.choerodon.core.oauth.CustomUserDetails;
 import io.choerodon.core.oauth.DetailsHelper;
@@ -33,12 +35,8 @@
 import io.choerodon.test.manager.infra.feign.operator.RemoteIamOperator;
 import io.choerodon.test.manager.infra.mapper.TestAttachmentMapper;
 import io.choerodon.test.manager.infra.mapper.TestCycleCaseAttachmentRelMapper;
-import io.choerodon.test.manager.infra.util.AttachmentUtils;
 import io.choerodon.test.manager.infra.util.IAttachmentPreviewInfoUtil;
 
-import org.hzero.boot.file.dto.FileDTO;
-import org.hzero.core.util.ResponseUtils;
-
 /**
  * Created by 842767365@qq.com on 6/11/18.
  */
@@ -62,8 +60,6 @@ public class TestCycleCaseAttachmentRelServiceImpl implements TestCycleCaseAttac
     private TestCycleCaseAttachmentRelUploadService testCycleCaseAttachmentRelUploadService;
     @Autowired
     private FilePathService filePathService;
-    @Autowired
-    private AttachmentUtils attachmentUtils;
 
     @Override
     public void deleteAttachmentRel(Long projectId,Long attachId) {
@@ -201,7 +197,10 @@ private void handAttachment(ProjectDTO project, List<TestCycleCaseAttachmentRelV
         if (CollectionUtils.isEmpty(testCycleCaseAttachmentRelVOS)) {
             return;
         }
-        List<String> fileUrls = testCycleCaseAttachmentRelVOS.stream().map(TestCycleCaseAttachmentRelVO::getUrl).collect(Collectors.toList());
+        List<String> fileUrls = testCycleCaseAttachmentRelVOS.stream()
+                .peek(testCycleCaseAttachmentRel -> testCycleCaseAttachmentRel.setFileKey(testCycleCaseAttachmentRel.getUrl()))
+                .map(TestCycleCaseAttachmentRelVO::getUrl)
+                .collect(Collectors.toList());
         if(CollectionUtils.isEmpty(fileUrls)) {
             return;
         }
diff --git a/src/main/java/io/choerodon/test/manager/app/service/impl/TestCycleCaseStepServiceImpl.java b/src/main/java/io/choerodon/test/manager/app/service/impl/TestCycleCaseStepServiceImpl.java
index 85dae4a8..f5091507 100644
--- a/src/main/java/io/choerodon/test/manager/app/service/impl/TestCycleCaseStepServiceImpl.java
+++ b/src/main/java/io/choerodon/test/manager/app/service/impl/TestCycleCaseStepServiceImpl.java
@@ -11,6 +11,8 @@
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import org.hzero.boot.file.dto.FileDTO;
+import org.hzero.core.util.ResponseUtils;
 import io.choerodon.core.domain.Page;
 import io.choerodon.core.exception.CommonException;
 import io.choerodon.core.oauth.CustomUserDetails;
@@ -29,14 +31,10 @@
 import io.choerodon.test.manager.infra.feign.FileFeignClient;
 import io.choerodon.test.manager.infra.feign.operator.RemoteIamOperator;
 import io.choerodon.test.manager.infra.mapper.*;
-import io.choerodon.test.manager.infra.util.AttachmentUtils;
 import io.choerodon.test.manager.infra.util.ConvertUtils;
 import io.choerodon.test.manager.infra.util.IAttachmentPreviewInfoUtil;
 import io.choerodon.test.manager.infra.util.PageUtil;
 
-import org.hzero.boot.file.dto.FileDTO;
-import org.hzero.core.util.ResponseUtils;
-
 /**
  * Created by 842767365@qq.com on 6/11/18.
  */
@@ -66,14 +64,10 @@ public class TestCycleCaseStepServiceImpl implements TestCycleCaseStepService {
     @Autowired
     private TestCycleCaseMapper testCycleCaseMapper;
     @Autowired
-    private FilePathService filePathService;
-    @Autowired
     private RemoteIamOperator remoteIamOperator;
     @Autowired
     private FileFeignClient fileFeignClient;
-    @Autowired
-    private AttachmentUtils attachmentUtils;
-    
+
     @Override
     public void update(TestCycleCaseStepVO testCycleCaseStepVO) {
         TestCycleCaseStepDTO testCycleCaseStepDTO = modelMapper.map(testCycleCaseStepVO, TestCycleCaseStepDTO.class);
@@ -298,7 +292,10 @@ private void handAttachment(Long projectId, List<TestCycleCaseStepVO> testCycleC
         if (CollectionUtils.isEmpty(testCycleCaseAttachmentRelVOS)) {
             return;
         }
-        List<String> fileUrls = testCycleCaseAttachmentRelVOS.stream().map(TestCycleCaseAttachmentRelVO::getUrl).collect(Collectors.toList());
+        List<String> fileUrls = testCycleCaseAttachmentRelVOS.stream()
+                .peek(testCycleCaseAttachmentRel -> testCycleCaseAttachmentRel.setFileKey(testCycleCaseAttachmentRel.getUrl()))
+                .map(TestCycleCaseAttachmentRelVO::getUrl)
+                .collect(Collectors.toList());
         if(CollectionUtils.isEmpty(fileUrls)) {
             return;
         }
diff --git a/src/main/java/io/choerodon/test/manager/infra/util/AttachmentUtils.java b/src/main/java/io/choerodon/test/manager/infra/util/AttachmentUtils.java
index 2c3f9b6c..b9bf2bfa 100644
--- a/src/main/java/io/choerodon/test/manager/infra/util/AttachmentUtils.java
+++ b/src/main/java/io/choerodon/test/manager/infra/util/AttachmentUtils.java
@@ -7,7 +7,6 @@
 
 import org.apache.commons.collections4.CollectionUtils;
 import org.apache.commons.lang3.StringUtils;
-import org.springframework.stereotype.Component;
 
 import org.hzero.core.base.BaseConstants;
 
@@ -16,9 +15,9 @@
  *
  * @author 汪翔 2023-06-05
  */
-@Component
 public class AttachmentUtils {
-    public String getFileKey(String relativePath) {
+
+    public static String getFileKey(String relativePath) {
         if (StringUtils.isNotEmpty(relativePath) && relativePath.startsWith(BaseConstants.Symbol.SLASH)) {
             return relativePath.substring(1);
         } else {
@@ -26,7 +25,7 @@ public String getFileKey(String relativePath) {
         }
     }
 
-    public Map<String, String> getFileKeys(Set<String> relativePaths) {
+    public static Map<String, String> getFileKeys(Set<String> relativePaths) {
         // 对于测试的附件
         if (CollectionUtils.isEmpty(relativePaths)) {
             return Collections.emptyMap();
@@ -36,15 +35,15 @@ public Map<String, String> getFileKeys(Set<String> relativePaths) {
         return fileKeys;
     }
 
-    public static String getFileType(String fileKey) {
-        if (StringUtils.isEmpty(fileKey)) {
-            return "";
+    public static String getFileType(String fileKeyOrUrl) {
+        if (StringUtils.isEmpty(fileKeyOrUrl)) {
+            return StringUtils.EMPTY;
         }
-        int index = fileKey.lastIndexOf(".");
+        int index = fileKeyOrUrl.lastIndexOf(BaseConstants.Symbol.POINT);
         if (index > -1) {
-            return fileKey.substring(index + 1);
+            return fileKeyOrUrl.substring(index + 1);
         } else {
-            return "";
+            return StringUtils.EMPTY;
         }
     }
 }
diff --git a/src/main/java/io/choerodon/test/manager/infra/util/IAttachmentPreviewInfoUtil.java b/src/main/java/io/choerodon/test/manager/infra/util/IAttachmentPreviewInfoUtil.java
index e0e3381d..2317f4be 100644
--- a/src/main/java/io/choerodon/test/manager/infra/util/IAttachmentPreviewInfoUtil.java
+++ b/src/main/java/io/choerodon/test/manager/infra/util/IAttachmentPreviewInfoUtil.java
@@ -10,10 +10,9 @@
 import org.springframework.util.Assert;
 import org.springframework.util.CollectionUtils;
 
-import io.choerodon.test.manager.api.vo.IAttachmentPreviewInfo;
-
 import org.hzero.boot.file.dto.FileDTO;
 import org.hzero.core.base.BaseConstants;
+import io.choerodon.test.manager.api.vo.IAttachmentPreviewInfo;
 
 /**
  * 可预览附件处理工具
@@ -29,7 +28,7 @@ public class IAttachmentPreviewInfoUtil {
      * @param fileInfos         文件信息
      */
     public static void fillAttachmentFileAttributeByFileKey(Collection<? extends IAttachmentPreviewInfo> attachmentInfos, Collection<? extends FileDTO> fileInfos) {
-        fillAttachmentFileAttributeByFileKey(attachmentInfos, fileInfos, IAttachmentPreviewInfo::getFileKey, FileDTO::getFileKey);
+        fillAttachmentFileAttributeByFileIdentity(attachmentInfos, fileInfos, IAttachmentPreviewInfo::getFileKey, FileDTO::getFileKey);
     }
 
     /**
@@ -38,7 +37,7 @@ public static void fillAttachmentFileAttributeByFileKey(Collection<? extends IAt
      * @param fileInfos         文件信息
      */
     public static void fillAttachmentFileAttributeByFileUrl(Collection<? extends IAttachmentPreviewInfo> attachmentInfos, Collection<? extends FileDTO> fileInfos) {
-        fillAttachmentFileAttributeByFileKey(attachmentInfos, fileInfos, IAttachmentPreviewInfo::getUrl, FileDTO::getFileUrl);
+        fillAttachmentFileAttributeByFileIdentity(attachmentInfos, fileInfos, IAttachmentPreviewInfo::getUrl, FileDTO::getFileUrl);
     }
 
     /**
@@ -48,7 +47,7 @@ public static void fillAttachmentFileAttributeByFileUrl(Collection<? extends IAt
      * @param attachmentIdentityExtractor 唯一键生成器
      * @param fileIdentityExtractor       唯一键生成器
      */
-    private static <K> void fillAttachmentFileAttributeByFileKey(Collection<? extends IAttachmentPreviewInfo> attachmentInfos,
+    private static <K> void fillAttachmentFileAttributeByFileIdentity(Collection<? extends IAttachmentPreviewInfo> attachmentInfos,
                                                                  Collection<? extends FileDTO> fileInfos,
                                                                  Function<IAttachmentPreviewInfo, K> attachmentIdentityExtractor,
                                                                  Function<FileDTO, K> fileIdentityExtractor) {