diff --git a/application/common/controller/Backend.php b/application/common/controller/Backend.php
index 9f9df101d72d3dabf3794cc6878f615708dcb878..a48d814d2fed457c7f1f8e3023fd103a11fbbc0a 100644
--- a/application/common/controller/Backend.php
+++ b/application/common/controller/Backend.php
@@ -7,6 +7,7 @@ use think\Config;
 use think\Controller;
 use think\Hook;
 use think\Lang;
+use think\Db;
 use think\Loader;
 use think\Model;
 use think\Session;
@@ -494,6 +495,18 @@ class Backend extends Controller
         $primarykey = $this->request->request("keyField");
         //主键值
         $primaryvalue = $this->request->request("keyValue");
+        // keyValue 与 keyField 必须成对合法，否则退回普通搜索，避免出现 [null => ...] 等异常条件
+        if ($primaryvalue === '') {
+            $primaryvalue = null;
+        }
+        $hasPrimaryInit = false;
+        if ($primaryvalue !== null) {
+            if (is_string($primarykey) && preg_match('/^[a-zA-Z0-9_\-]+$/i', $primarykey) === 1) {
+                $hasPrimaryInit = true;
+            } else {
+                $primaryvalue = null;
+            }
+        }
         //搜索字段
         $searchfield = (array)$this->request->request("searchField/a");
         //自定义搜索条件
@@ -511,8 +524,8 @@ class Backend extends Controller
         }
         $field = $field ? $field : 'name';
 
-        //如果有primaryvalue,说明当前是初始化传值
-        if ($primaryvalue !== null) {
+        //如果有 primaryvalue 且 keyField 合法，说明当前是初始化传值
+        if ($hasPrimaryInit) {
             $where = [$primarykey => ['in', $primaryvalue]];
             $pagesize = 999999;
         } else {
@@ -556,17 +569,26 @@ class Backend extends Controller
 
             $fields = is_array($this->selectpageFields) ? $this->selectpageFields : ($this->selectpageFields && $this->selectpageFields != '*' ? explode(',', $this->selectpageFields) : []);
 
-            //如果有primaryvalue,说明当前是初始化传值,按照选择顺序排序
-            if ($primaryvalue !== null && preg_match("/^[a-z0-9_\-]+$/i", $primarykey)) {
-                $primaryvalue = array_unique(is_array($primaryvalue) ? $primaryvalue : explode(',', $primaryvalue));
-                //修复自定义data-primary-key为字符串内容时，给排序字段添加上引号
-                $primaryvalue = array_map(function ($value) {
-                    return '\'' . $value . '\'';
-                }, $primaryvalue);
-
-                $primaryvalue = implode(',', $primaryvalue);
-
-                $this->model->orderRaw("FIELD(`{$primarykey}`, {$primaryvalue})");
+            // 初始化传值时按 FIELD 顺序排序（值使用 PDO 转义，防止注入）
+            if ($hasPrimaryInit && is_string($primarykey) && preg_match('/^[a-zA-Z0-9_\-]+$/i', $primarykey) === 1) {
+                $primaryValueList = is_array($primaryvalue) ? $primaryvalue : explode(',', (string)$primaryvalue);
+                $primaryValueList = array_values(array_unique(array_filter(
+                    $primaryValueList,
+                    static function ($v) {
+                        return $v !== null && $v !== '';
+                    }
+                )));
+                if ($primaryValueList !== []) {
+                    $pdo = Db::connect()->getPdo();
+                    $quoted = [];
+                    foreach ($primaryValueList as $value) {
+                        $quoted[] = $pdo->quote((string)$value);
+                    }
+                    $columnExpr = '`' . str_replace('.', '`.`', $primarykey) . '`';
+                    $this->model->orderRaw('FIELD(' . $columnExpr . ', ' . implode(',', $quoted) . ')');
+                } else {
+                    $this->model->order($order);
+                }
             } else {
                 $this->model->order($order);
             }
@@ -592,7 +614,7 @@ class Backend extends Controller
                 }, $result);
                 $list[] = $result;
             }
-            if ($istree && !$primaryvalue) {
+            if ($istree && !$hasPrimaryInit) {
                 $tree = Tree::instance();
                 $tree->init(collection($list)->toArray(), 'pid');
                 $list = $tree->getTreeList($tree->getTreeArray(0), $field);