diff --git a/backend/src/main/java/com/qqchen/deploy/backend/deploy/entity/RepositorySyncHistory.java b/backend/src/main/java/com/qqchen/deploy/backend/deploy/entity/RepositorySyncHistory.java
index a4fc05de..ff3fa49d 100644
--- a/backend/src/main/java/com/qqchen/deploy/backend/deploy/entity/RepositorySyncHistory.java
+++ b/backend/src/main/java/com/qqchen/deploy/backend/deploy/entity/RepositorySyncHistory.java
@@ -4,6 +4,8 @@ import com.qqchen.deploy.backend.deploy.enums.ExternalSystemSyncStatus;
 import com.qqchen.deploy.backend.deploy.enums.RepositorySyncType;
 import com.qqchen.deploy.backend.framework.domain.Entity;
 import jakarta.persistence.Column;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
 import jakarta.persistence.Table;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -32,9 +34,11 @@ public class RepositorySyncHistory extends Entity<Long> {
     private String errorMessage;
 
     @Column(nullable = false)
+    @Enumerated(EnumType.STRING)
     private ExternalSystemSyncStatus status;
 
     @Column(nullable = false)
+    @Enumerated(EnumType.STRING)
     private RepositorySyncType syncType;
 
     @Column(nullable = false)
diff --git a/backend/src/main/java/com/qqchen/deploy/backend/deploy/service/impl/RepositoryBranchServiceImpl.java b/backend/src/main/java/com/qqchen/deploy/backend/deploy/service/impl/RepositoryBranchServiceImpl.java
index 16b8b97b..8204e9c0 100644
--- a/backend/src/main/java/com/qqchen/deploy/backend/deploy/service/impl/RepositoryBranchServiceImpl.java
+++ b/backend/src/main/java/com/qqchen/deploy/backend/deploy/service/impl/RepositoryBranchServiceImpl.java
@@ -4,6 +4,8 @@ import com.qqchen.deploy.backend.deploy.entity.ExternalSystem;
 import com.qqchen.deploy.backend.deploy.entity.RepositoryProject;
 import com.qqchen.deploy.backend.deploy.entity.RepositoryBranch;
 import com.qqchen.deploy.backend.deploy.dto.RepositoryBranchDTO;
+import com.qqchen.deploy.backend.deploy.enums.ExternalSystemSyncStatus;
+import com.qqchen.deploy.backend.deploy.enums.RepositorySyncType;
 import com.qqchen.deploy.backend.deploy.integration.IGitServiceIntegration;
 import com.qqchen.deploy.backend.deploy.integration.response.GitBranchResponse;
 import com.qqchen.deploy.backend.deploy.query.RepositoryBranchQuery;
@@ -14,6 +16,10 @@ import com.qqchen.deploy.backend.deploy.service.IRepositoryBranchService;
 import com.qqchen.deploy.backend.framework.enums.ResponseCode;
 import com.qqchen.deploy.backend.framework.exception.BusinessException;
 import com.qqchen.deploy.backend.framework.service.impl.BaseServiceImpl;
+import com.qqchen.deploy.backend.deploy.dto.RepositorySyncHistoryDTO;
+import com.qqchen.deploy.backend.deploy.entity.RepositorySyncHistory;
+import com.qqchen.deploy.backend.deploy.service.IRepositorySyncHistoryService;
+import com.qqchen.deploy.backend.deploy.repository.IRepositorySyncHistoryRepository;
 import jakarta.annotation.Resource;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
@@ -44,44 +50,75 @@ public class RepositoryBranchServiceImpl extends BaseServiceImpl<RepositoryBranc
     @Resource
     private IGitServiceIntegration gitServiceIntegration;
 
+    @Resource
+    private IRepositorySyncHistoryService repositorySyncHistoryService;
+
+    @Resource
+    private IRepositorySyncHistoryRepository repositorySyncHistoryRepository;
+
     @Override
     @Transactional
     public Integer syncBranches(Long externalSystemId) {
+        // 1. 创建同步历史记录
+        RepositorySyncHistoryDTO syncHistory = repositorySyncHistoryService.createSyncHistory(
+            externalSystemId, RepositorySyncType.BRANCH);
+
         try {
-            // 1. 获取外部系统信息
+            // 2. 获取外部系统信息
             ExternalSystem externalSystem = externalSystemRepository.findById(externalSystemId)
                 .orElseThrow(() -> new BusinessException(ResponseCode.EXTERNAL_SYSTEM_NOT_FOUND));
 
-            // 2. 获取所有项目
+            // 3. 获取所有项目
             List<RepositoryProject> projects = repositoryProjectRepository.findByExternalSystemIdAndDeletedFalse(externalSystemId);
             if (projects.isEmpty()) {
                 log.info("No projects found for external system: {}", externalSystem.getName());
+                repositorySyncHistoryService.updateSyncHistory(syncHistory.getId(), ExternalSystemSyncStatus.SUCCESS, null);
+                return 0;
+            }
+
+            // 4. 获取上次成功同步的历史记录
+            RepositorySyncHistory lastSuccessSync = repositorySyncHistoryRepository
+                .findTopByExternalSystemIdAndSyncTypeAndStatusOrderByStartTimeDesc(
+                    externalSystemId, RepositorySyncType.BRANCH, ExternalSystemSyncStatus.SUCCESS);
+
+            // 5. 筛选需要同步的项目
+            List<RepositoryProject> projectsToSync = projects;
+            if (lastSuccessSync != null) {
+                projectsToSync = projects.stream()
+                    .filter(project -> project.getLastActivityAt() == null || 
+                            project.getLastActivityAt().isAfter(lastSuccessSync.getEndTime()))
+                    .collect(Collectors.toList());
+            }
+
+            if (projectsToSync.isEmpty()) {
+                log.info("No projects need to be synchronized for external system: {}", externalSystem.getName());
+                repositorySyncHistoryService.updateSyncHistory(syncHistory.getId(), ExternalSystemSyncStatus.SUCCESS, null);
                 return 0;
             }
 
             int totalSyncedBranches = 0;
-            // 3. 同步每个项目的分支
-            for (RepositoryProject project : projects) {
+            // 6. 同步需要更新的项目的分支
+            for (RepositoryProject project : projectsToSync) {
                 try {
-                    // 3.1 获取远程分支信息
+                    // 6.1 获取远程分支信息
                     List<GitBranchResponse> remoteBranches = gitServiceIntegration.branches(externalSystem, project.getProjectId());
                     if (remoteBranches.isEmpty()) {
                         log.info("No branches found for project: {}", project.getName());
                         continue;
                     }
 
-                    // 3.2 获取本地已存在的分支
+                    // 6.2 获取本地已存在的分支
                     List<RepositoryBranch> existingBranches = repositoryBranchRepository.findByExternalSystemIdAndProjectIdAndDeletedFalse(
                         externalSystemId, project.getId());
                     Map<String, RepositoryBranch> existingBranchMap = existingBranches.stream()
                         .collect(Collectors.toMap(RepositoryBranch::getName, Function.identity()));
 
-                    // 3.3 更新或创建分支
+                    // 6.3 更新或创建分支
                     List<RepositoryBranch> branchesToSave = remoteBranches.stream()
                         .map(remoteBranch -> updateOrCreateBranch(externalSystemId, project.getId(), remoteBranch, existingBranchMap))
                         .collect(Collectors.toList());
 
-                    // 3.4 保存分支
+                    // 6.4 保存分支
                     repositoryBranchRepository.saveAll(branchesToSave);
                     totalSyncedBranches += branchesToSave.size();
 
@@ -92,10 +129,15 @@ public class RepositoryBranchServiceImpl extends BaseServiceImpl<RepositoryBranc
                 }
             }
 
+            // 7. 更新同步历史为成功
+            repositorySyncHistoryService.updateSyncHistory(syncHistory.getId(), ExternalSystemSyncStatus.SUCCESS, null);
+
             log.info("Successfully synchronized total {} branches for external system: {}", 
                 totalSyncedBranches, externalSystem.getName());
             return totalSyncedBranches;
         } catch (Exception e) {
+            // 8. 更新同步历史为失败
+            repositorySyncHistoryService.updateSyncHistory(syncHistory.getId(), ExternalSystemSyncStatus.FAILED, e.getMessage());
             log.error("Failed to sync branches for external system: {}", externalSystemId, e);
             throw new BusinessException(ResponseCode.REPOSITORY_BRANCH_SYNC_FAILED);
         }