diff --git a/backend/src/main/java/com/designhub/service/TaskApprovalService.java b/backend/src/main/java/com/designhub/service/TaskApprovalService.java
index df58fd7..4c66fbc 100644
--- a/backend/src/main/java/com/designhub/service/TaskApprovalService.java
+++ b/backend/src/main/java/com/designhub/service/TaskApprovalService.java
@@ -608,8 +608,16 @@ public class TaskApprovalService {
 
     /**
      * 验证审核人权限
+     * 管理员可以代审核所有任务
      */
     private void validateApprover(Task task, Long approverId, String expectedRole) {
+        // 检查是否是管理员，管理员可以代审核所有任务
+        User approver = userMapper.selectById(approverId);
+        if (approver != null && Integer.valueOf(1).equals(approver.getIsAdmin())) {
+            log.info("管理员 {} 代审核任务 {}", approver.getRealName(), task.getId());
+            return; // 管理员绕过权限验证
+        }
+        
         if (!approverId.equals(task.getCurrentApproverId())) {
             throw new BusinessException(ResultCode.FORBIDDEN, "您无权审核此任务");
         }
diff --git a/backend/src/main/java/com/designhub/service/TaskItemService.java b/backend/src/main/java/com/designhub/service/TaskItemService.java
index 9e67b87..518d1d9 100644
--- a/backend/src/main/java/com/designhub/service/TaskItemService.java
+++ b/backend/src/main/java/com/designhub/service/TaskItemService.java
@@ -454,13 +454,20 @@ public class TaskItemService {
             throw new BusinessException(ResultCode.NOT_FOUND, "主任务不存在");
         }
 
-        // 2. 验证审核人权限（必须是接单部门负责人）
-        if (mainTask.getReceiverDeptId() == null) {
-            throw new BusinessException(ResultCode.FORBIDDEN, "任务未指定接单部门");
-        }
-        com.designhub.entity.Department receiverDept = departmentMapper.selectById(mainTask.getReceiverDeptId());
-        if (receiverDept == null || !approverId.equals(receiverDept.getLeaderId())) {
-            throw new BusinessException(ResultCode.FORBIDDEN, "只有接单部门负责人可以审核子任务组");
+        // 2. 验证审核人权限（必须是接单部门负责人或管理员）
+        com.designhub.entity.User approver = userService.getUserById(approverId);
+        boolean isAdmin = approver != null && Integer.valueOf(1).equals(approver.getIsAdmin());
+        
+        if (!isAdmin) {
+            if (mainTask.getReceiverDeptId() == null) {
+                throw new BusinessException(ResultCode.FORBIDDEN, "任务未指定接单部门");
+            }
+            com.designhub.entity.Department receiverDept = departmentMapper.selectById(mainTask.getReceiverDeptId());
+            if (receiverDept == null || !approverId.equals(receiverDept.getLeaderId())) {
+                throw new BusinessException(ResultCode.FORBIDDEN, "只有接单部门负责人可以审核子任务组");
+            }
+        } else {
+            log.info("管理员 {} 代审核子任务组", approver.getRealName());
         }
 
         // 3. 获取该组的所有待审核子任务
@@ -649,13 +656,20 @@ public class TaskItemService {
             throw new BusinessException(ResultCode.NOT_FOUND, "主任务不存在");
         }
 
-        // 2. 验证审核人权限（必须是接单部门负责人）
-        if (mainTask.getReceiverDeptId() == null) {
-            throw new BusinessException(ResultCode.FORBIDDEN, "任务未指定接单部门");
-        }
-        com.designhub.entity.Department receiverDept = departmentMapper.selectById(mainTask.getReceiverDeptId());
-        if (receiverDept == null || !rejectorId.equals(receiverDept.getLeaderId())) {
-            throw new BusinessException(ResultCode.FORBIDDEN, "只有接单部门负责人可以驳回子任务组");
+        // 2. 验证审核人权限（必须是接单部门负责人或管理员）
+        com.designhub.entity.User rejector = userService.getUserById(rejectorId);
+        boolean isAdmin = rejector != null && Integer.valueOf(1).equals(rejector.getIsAdmin());
+        
+        if (!isAdmin) {
+            if (mainTask.getReceiverDeptId() == null) {
+                throw new BusinessException(ResultCode.FORBIDDEN, "任务未指定接单部门");
+            }
+            com.designhub.entity.Department receiverDept = departmentMapper.selectById(mainTask.getReceiverDeptId());
+            if (receiverDept == null || !rejectorId.equals(receiverDept.getLeaderId())) {
+                throw new BusinessException(ResultCode.FORBIDDEN, "只有接单部门负责人可以驳回子任务组");
+            }
+        } else {
+            log.info("管理员 {} 代驳回子任务组", rejector.getRealName());
         }
 
         // 3. 更新主任务状态为 rejected
diff --git a/backend/src/main/java/com/designhub/service/TaskService.java b/backend/src/main/java/com/designhub/service/TaskService.java
index a960a9c..8a2cd17 100644
--- a/backend/src/main/java/com/designhub/service/TaskService.java
+++ b/backend/src/main/java/com/designhub/service/TaskService.java
@@ -976,6 +976,13 @@ public class TaskService {
      */
     private boolean isAdminUser(Long userId) {
         try {
+            // 首先检查用户的 isAdmin 字段
+            User user = userService.getUserById(userId);
+            if (user != null && Integer.valueOf(1).equals(user.getIsAdmin())) {
+                return true;
+            }
+            
+            // 其次检查角色
             var roles = roleService.getRolesByUserId(userId);
             return roles.stream().anyMatch(role -> 
                 "ADMIN".equals(role.getRoleCode()) ||