diff --git a/app/admin/service/VehColorService.php b/app/admin/service/VehColorService.php
index be83fcd..7c111c8 100644
--- a/app/admin/service/VehColorService.php
+++ b/app/admin/service/VehColorService.php
@@ -48,11 +48,47 @@ class VehColorService
         );
     }
 
+    /**
+     * 生成唯一的7位颜色编码
+     * 格式：C + (O/I) + 5位字母数字组合
+     * 
+     * @param int $type 类型：2=I，其他=O
+     * @return string 7位唯一编码
+     */
+    public function generateUniqueColorCode($type)
+    {
+        $secondChar = $type ==2 ? 'I' : 'O';
+        $chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
+        $maxAttempts = 10; // 防止无限循环
+        
+        for ($attempt = 0; $attempt < $maxAttempts; $attempt++) {
+            // 生成后5位随机字符
+            $suffix = '';
+            for ($i = 0; $i < 5; $i++) {
+                $suffix .= $chars[rand(0, strlen($chars) - 1)];
+            }
+            
+            $colorCode = 'C' . $secondChar . $suffix;
+            
+            // 检查是否已存在
+            $existing = VehColor::where('color_code', $colorCode)->first();
+            if (!$existing) {
+                return $colorCode;
+            }
+        }
+        
+        // 如果1000次尝试后仍然重复，使用时间戳确保唯一性
+        $timestamp = substr(time(), -5);
+        return 'C' . $secondChar . $timestamp;
+    }
+
     /**
      * 添加前置处理
      */
     public function beforeServiceStore($data, Request $request)
     {
+        $type = $data['type'] ?? 0;
+        $data['color_code'] = $this->generateUniqueColorCode($type);
         $data['created_by'] = $request->user->uid;
         $data['updated_by'] = $request->user->uid;
         return $data;
diff --git a/app/admin/service/VehModificationService.php b/app/admin/service/VehModificationService.php
index 6c56d9b..038129b 100644
--- a/app/admin/service/VehModificationService.php
+++ b/app/admin/service/VehModificationService.php
@@ -80,4 +80,47 @@ class VehModificationService
 
         return $config;
     }
+
+        /**
+     * 生成唯一的7位颜色编码
+     * 格式：C + (O/I) + 5位字母数字组合
+     * 
+     * @param int $type 类型
+     * @return string 7位唯一编码
+     */
+    public function generateUniqueModificationCode($type)
+    {
+        $chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
+        $maxAttempts = 10; // 防止无限循环
+        
+        for ($attempt = 0; $attempt < $maxAttempts; $attempt++) {
+            // 生成后5位随机字符
+            $suffix = '';
+            for ($i = 0; $i < 5; $i++) {
+                $suffix .= $chars[rand(0, strlen($chars) - 1)];
+            }
+
+            $code = 'C' . $type . $suffix;
+            
+            // 检查是否已存在
+            $existing = VehModification::where('code', $code)->first();
+            if (!$existing) {
+                return $code;
+            }
+        }
+        
+        // 如果1000次尝试后仍然重复，使用时间戳确保唯一性
+        $timestamp = substr(time(), -5);
+        return 'C' . $type . $timestamp;
+    }
+
+    /**
+     * 添加前置处理
+     */
+    public function beforeServiceStore($data, Request $request)
+    {
+        $type = $data['type'] ?? 0;
+        $data['code'] = $this->generateUniqueModificationCode($type);
+        return $data;
+    }
 }
\ No newline at end of file