diff --git a/backend/src/main/java/com/designhub/service/DingTalkService.java b/backend/src/main/java/com/designhub/service/DingTalkService.java
index 1719266..fb96440 100644
--- a/backend/src/main/java/com/designhub/service/DingTalkService.java
+++ b/backend/src/main/java/com/designhub/service/DingTalkService.java
@@ -950,6 +950,7 @@ public class DingTalkService {
         int updatedUsers = 0;
         int skippedUsers = 0;
         int errorUsers = 0;
+        int disabledUsers = 0;  // 已离职被禁用的用户数
         List<String> errors = new ArrayList<>();
         
         try {
@@ -974,6 +975,18 @@ public class DingTalkService {
                     Map<String, Object> dingUserInfo = getDingUserDetail(accessToken, user.getDingUserId());
                     
                     if (dingUserInfo != null) {
+                        // 检查是否是"找不到用户"的错误（已离职）
+                        Object errcode = dingUserInfo.get("_errcode");
+                        if (errcode != null && "60121".equals(errcode.toString())) {
+                            // 用户在钉钉中不存在（已离职），禁用该用户
+                            user.setStatus(0);
+                            userMapper.updateById(user);
+                            disabledUsers++;
+                            log.info("用户在钉钉中不存在（已离职），已禁用: userId={}, userName={}", 
+                                user.getId(), user.getRealName());
+                            continue;
+                        }
+                        
                         // 获取用户的主部门ID
                         Object deptIdListObj = dingUserInfo.get("dept_id_list");
                         if (deptIdListObj instanceof List && !((List<?>) deptIdListObj).isEmpty()) {
@@ -1049,15 +1062,18 @@ public class DingTalkService {
         result.put("updatedUsers", updatedUsers);
         result.put("skippedUsers", skippedUsers);
         result.put("errorUsers", errorUsers);
+        result.put("disabledUsers", disabledUsers);
         result.put("errors", errors);
         
-        log.info("钉钉组织架构同步完成: 更新{}人, 跳过{}人, 失败{}人", updatedUsers, skippedUsers, errorUsers);
+        log.info("钉钉组织架构同步完成: 更新{}人, 跳过{}人, 禁用{}人(已离职), 失败{}人", 
+            updatedUsers, skippedUsers, disabledUsers, errorUsers);
         
         return result;
     }
     
     /**
      * 获取钉钉用户详情
+     * 注意：如果用户不存在（errcode=60121），会返回包含 _errcode 字段的 Map
      */
     private Map<String, Object> getDingUserDetail(String accessToken, String dingUserId) {
         try {
@@ -1080,6 +1096,13 @@ public class DingTalkService {
                 } else {
                     log.warn("获取钉钉用户详情失败: userId={}, errcode={}, errmsg={}", 
                         dingUserId, errcode, body.get("errmsg"));
+                    // 如果是"找不到用户"的错误，返回包含错误码的 Map，便于调用方判断
+                    if (errcode != null && ("60121".equals(errcode.toString()) || errcode.equals(60121))) {
+                        Map<String, Object> errorResult = new HashMap<>();
+                        errorResult.put("_errcode", "60121");
+                        errorResult.put("_errmsg", "找不到该用户");
+                        return errorResult;
+                    }
                 }
             }
         } catch (Exception e) {
diff --git a/frontend/src/views/Settings.vue b/frontend/src/views/Settings.vue
index b9f7782..dcbba0d 100644
--- a/frontend/src/views/Settings.vue
+++ b/frontend/src/views/Settings.vue
@@ -3389,7 +3389,14 @@ const handleSyncOrganization = async () => {
     const response = await request.post('/dingtalk/sync-organization', {}, { timeout: 120000 })
     if (response.code === 200) {
       const result = response.data as any
-      message.success({ content: `同步完成！更新${result.updatedUsers}人，跳过${result.skippedUsers}人，失败${result.errorUsers}人`, key: 'sync' })
+      let msg = `同步完成！更新${result.updatedUsers}人，跳过${result.skippedUsers}人`
+      if (result.disabledUsers > 0) {
+        msg += `，禁用${result.disabledUsers}人(已离职)`
+      }
+      if (result.errorUsers > 0) {
+        msg += `，失败${result.errorUsers}人`
+      }
+      message.success({ content: msg, key: 'sync' })
       
       // 如果有错误信息，显示详情
       if (result.errors && result.errors.length > 0) {