diff --git a/library/think/Validate.php b/library/think/Validate.php
index df6c6e75..32196a46 100644
--- a/library/think/Validate.php
+++ b/library/think/Validate.php
@@ -880,12 +880,16 @@ class Validate
             // 支持多个字段验证
             $fields = explode('^', $key);
             foreach ($fields as $key) {
-                $map[$key] = $data[$key];
+                if (isset($data[$field])) {
+                    $map[$key] = $data[$key];
+                }
             }
         } elseif (strpos($key, '=')) {
             parse_str($key, $map);
-        } else {
+        } elseif (isset($data[$field])) {
             $map[$key] = $data[$field];
+        } else {
+            $map = [];
         }
 
         $pk = isset($rule[3]) ? $rule[3] : $db->getPk();