diff --git a/PROJECT_ISSUES.md b/PROJECT_ISSUES.md
index c38c63e..d490cd8 100644
--- a/PROJECT_ISSUES.md
+++ b/PROJECT_ISSUES.md
@@ -441,6 +441,76 @@ navigate('/approval')  // 改为跳转到审批列表
 
 **相关文件**：`frontend/src/pages/business-trip/apply.tsx`
 
+### 23. 发起人自动审批通过逻辑
+
+**需求**：当发起人选择的审批人中包含自己时，提交时自动标记为已审批
+
+**实现逻辑**：
+1. 检查发起人是否在审批人列表中
+2. 如果是，自动创建审批通过记录
+3. 根据节点类型判断是否完成：
+   - 单人审批（approver）：发起人审批后节点完成
+   - 或签（or_approve）：发起人审批后节点完成
+   - 会签（and_approve）：需要所有审批人审批才完成
+4. 节点完成后移动到下一节点或完成审批
+
+**解决方案**：
+```php
+// 如果发起人在审批人列表中，自动标记为已审批
+if (in_array($userId, $approverIds)) {
+    ApprovalRecord::create([
+        'order_id' => $approvalOrder->id,
+        'node_id' => $node->id,
+        'node_type' => $node->type,
+        'approver_id' => $userId,
+        'action' => 'approve',
+        'comment' => '发起人自动审批通过',
+    ]);
+
+    // 判断节点是否完成
+    $nodeCompleted = false;
+
+    if ($node->type === 'approver') {
+        // 单人审批：发起人即完成
+        $nodeCompleted = true;
+    } elseif ($node->type === 'or_approve') {
+        // 或签：任一人通过即可
+        $nodeCompleted = true;
+    } elseif ($node->type === 'and_approve') {
+        // 会签：需要所有人通过
+        $approvedCount = ApprovalRecord::where('order_id', $approvalOrder->id)
+            ->where('node_id', $node->id)
+            ->where('action', 'approve')
+            ->count();
+
+        if ($approvedCount >= count($approverIds)) {
+            $nodeCompleted = true;
+        }
+    }
+
+    // 如果节点完成，移动到下一节点
+    if ($nodeCompleted) {
+        $nextNodes = ApprovalNode::where('flow_id', $flow->id)
+            ->where('order', '>', 0)
+            ->orderBy('order')
+            ->get();
+
+        if ($nextNodes->isEmpty()) {
+            // 审批完成
+            $approvalOrder->status = ApprovalOrder::STATUS_APPROVED;
+            $approvalOrder->current_nodes = [];
+        } else {
+            // 移动到下一节点
+            $approvalOrder->current_nodes = $nextNodes->pluck('id')->toArray();
+        }
+
+        $approvalOrder->save();
+    }
+}
+```
+
+**相关文件**：`backend/app/service/BusinessTripService.php`
+
 ---
 
 ## 文件修改记录
diff --git a/backend/app/service/BusinessTripService.php b/backend/app/service/BusinessTripService.php
index a96cc14..133a7c9 100644
--- a/backend/app/service/BusinessTripService.php
+++ b/backend/app/service/BusinessTripService.php
@@ -215,6 +215,60 @@ class BusinessTripService
                 'comment' => null,
             ]);
 
+            // 如果发起人在审批人列表中，自动标记为已审批
+            if (in_array($userId, $approverIds)) {
+                ApprovalRecord::create([
+                    'order_id' => $approvalOrder->id,
+                    'node_id' => $node->id,
+                    'node_type' => $node->type,
+                    'approver_id' => $userId,
+                    'action' => 'approve',
+                    'comment' => '发起人自动审批通过',
+                ]);
+
+                // 判断节点是否完成
+                $nodeCompleted = false;
+
+                if ($node->type === 'approver') {
+                    // 单人审批：发起人即完成
+                    $nodeCompleted = true;
+                } elseif ($node->type === 'or_approve') {
+                    // 或签：任一人通过即可
+                    $nodeCompleted = true;
+                } elseif ($node->type === 'and_approve') {
+                    // 会签：需要所有人通过
+                    $approvedCount = ApprovalRecord::where('order_id', $approvalOrder->id)
+                        ->where('node_id', $node->id)
+                        ->where('action', 'approve')
+                        ->count();
+
+                    if ($approvedCount >= count($approverIds)) {
+                        $nodeCompleted = true;
+                    }
+                }
+
+                // 如果节点完成，移动到下一节点
+                if ($nodeCompleted) {
+                    $nextNodes = ApprovalNode::where('flow_id', $flow->id)
+                        ->where('order', '>', 0)
+                        ->orderBy('order')
+                        ->get();
+
+                    if ($nextNodes->isEmpty()) {
+                        // 没有后续节点，审批完成
+                        $approvalOrder->status = ApprovalOrder::STATUS_APPROVED;
+                        $approvalOrder->current_nodes = [];
+                        $businessTrip->status = BusinessTrip::STATUS_APPROVED;
+                    } else {
+                        // 移动到下一节点
+                        $approvalOrder->current_nodes = $nextNodes->pluck('id')->toArray();
+                    }
+
+                    $approvalOrder->save();
+                    $businessTrip->save();
+                }
+            }
+
             return $businessTrip->fresh(['itineraries', 'approvalOrder']);
         });
     }