diff --git a/backend/src/main/java/com/qqchen/deploy/backend/deploy/service/impl/RepositoryProjectServiceImpl.java b/backend/src/main/java/com/qqchen/deploy/backend/deploy/service/impl/RepositoryProjectServiceImpl.java
index 0c20e6bd..bd7cd38b 100644
--- a/backend/src/main/java/com/qqchen/deploy/backend/deploy/service/impl/RepositoryProjectServiceImpl.java
+++ b/backend/src/main/java/com/qqchen/deploy/backend/deploy/service/impl/RepositoryProjectServiceImpl.java
@@ -330,25 +330,36 @@ public class RepositoryProjectServiceImpl extends BaseServiceImpl<RepositoryProj
             return;
         }
 
-        // 1. 收集所有仓库组的 repo_group_id（Git系统的组ID，不是数据库主键）
+        // 1. 收集所有仓库组的 repo_group_id 和 external_system_id
         Set<Long> repoGroupIds = projects.stream()
             .map(RepositoryProjectDTO::getRepoGroupId)
             .filter(id -> id != null)
             .collect(Collectors.toSet());
+        
+        Set<Long> externalSystemIds = projects.stream()
+            .map(RepositoryProjectDTO::getExternalSystemId)
+            .filter(id -> id != null)
+            .collect(Collectors.toSet());
 
-        // 2. 批量查询仓库组信息（根据 repo_group_id 字段查询，不是主键 id）
-        Map<Long, RepositoryGroup> repoGroupMap = Collections.emptyMap();
+        // 2. 批量查询仓库组信息（需要同时匹配 repo_group_id 和 external_system_id）
+        Map<String, RepositoryGroup> repoGroupMap = Collections.emptyMap();
         if (!repoGroupIds.isEmpty()) {
             List<Long> repoGroupIdList = new ArrayList<>(repoGroupIds);
+            // 使用复合键：externalSystemId + "_" + repoGroupId 避免不同系统的 ID 冲突
             repoGroupMap = repositoryGroupRepository.findByRepoGroupIdIn(repoGroupIdList).stream()
-                .collect(Collectors.toMap(RepositoryGroup::getRepoGroupId, Function.identity()));
+                .filter(group -> externalSystemIds.contains(group.getExternalSystemId()))
+                .collect(Collectors.toMap(
+                    group -> group.getExternalSystemId() + "_" + group.getRepoGroupId(),
+                    Function.identity()
+                ));
         }
 
-        // 3. 填充仓库组名称（使用 repo_group_id 作为 key）
-        Map<Long, RepositoryGroup> finalRepoGroupMap = repoGroupMap;
+        // 3. 填充仓库组名称（使用复合键：externalSystemId + "_" + repoGroupId）
+        Map<String, RepositoryGroup> finalRepoGroupMap = repoGroupMap;
         projects.forEach(project -> {
-            if (project.getRepoGroupId() != null) {
-                RepositoryGroup group = finalRepoGroupMap.get(project.getRepoGroupId());
+            if (project.getRepoGroupId() != null && project.getExternalSystemId() != null) {
+                String key = project.getExternalSystemId() + "_" + project.getRepoGroupId();
+                RepositoryGroup group = finalRepoGroupMap.get(key);
                 if (group != null) {
                     project.setRepoGroupName(group.getName());
                 }