diff --git a/backend/app/controller/FeishuCardController.php b/backend/app/controller/FeishuCardController.php
index 8681f42..c9c2cfe 100644
--- a/backend/app/controller/FeishuCardController.php
+++ b/backend/app/controller/FeishuCardController.php
@@ -184,13 +184,27 @@ class FeishuCardController extends BaseController
         try {
             $approvalService = new ApprovalService();
 
-            // 检查用户是否有权限审批
+            // 检查订单状态
             $order = \app\model\ApprovalOrder::find($orderId);
             if (!$order) {
                 error_log('❌ 审批单不存在: order_id=' . $orderId);
                 return $this->errorCard('审批单不存在');
             }
 
+            // 检查订单是否已经处理过
+            if ($order->status === \app\model\ApprovalOrder::STATUS_APPROVED) {
+                error_log('⚠️ 订单已通过: order_id=' . $orderId);
+                return $this->infoCard('该申请已通过', '此申请已经被审批通过，无需重复操作。');
+            }
+            if ($order->status === \app\model\ApprovalOrder::STATUS_REJECTED) {
+                error_log('⚠️ 订单已拒绝: order_id=' . $orderId);
+                return $this->infoCard('该申请已拒绝', '此申请已经被拒绝，如需重新申请请提交新的申请。');
+            }
+            if ($order->status === \app\model\ApprovalOrder::STATUS_CANCELLED) {
+                error_log('⚠️ 订单已撤销: order_id=' . $orderId);
+                return $this->infoCard('该申请已撤销', '此申请已经被撤销。');
+            }
+
             error_log('📝 开始审批通过: order_id=' . $orderId . ', user_id=' . $user->id . ', remark=' . $remark);
 
             // 执行审批通过
diff --git a/backend/app/service/ApprovalService.php b/backend/app/service/ApprovalService.php
index f9c2b81..3c89600 100644
--- a/backend/app/service/ApprovalService.php
+++ b/backend/app/service/ApprovalService.php
@@ -553,10 +553,23 @@ class ApprovalService
         $currentNodeIds = $order->current_nodes ?? [];
         error_log("🔄 自审批自动通过 - 当前节点: " . json_encode($currentNodeIds));
 
+        // 检查订单是否已经结束
+        if (empty($currentNodeIds)) {
+            error_log("❌ 自审批：订单已完成，current_nodes为空");
+            if ($order->status === ApprovalOrder::STATUS_APPROVED) {
+                throw new \Exception('该申请已通过，无需重复操作');
+            } else if ($order->status === ApprovalOrder::STATUS_REJECTED) {
+                throw new \Exception('该申请已被拒绝');
+            } else if ($order->status === ApprovalOrder::STATUS_CANCELLED) {
+                throw new \Exception('该申请已被撤销');
+            }
+            throw new \Exception('该申请已完成，无法重复操作');
+        }
+
         $currentNode = ApprovalNode::whereIn('id', $currentNodeIds)->first();
 
         if (!$currentNode) {
-            error_log("❌ 自审批：当前节点不存在");
+            error_log("❌ 自审批：当前节点不存在，IDs: " . json_encode($currentNodeIds));
             throw new \Exception('当前节点不存在');
         }