diff --git a/library/think/db/Query.php b/library/think/db/Query.php
index 24f5ce2a..45c66ccf 100644
--- a/library/think/db/Query.php
+++ b/library/think/db/Query.php
@@ -1169,8 +1169,10 @@ class Query
             $this->options['multi'][$logic][$field][] = $where[$field];
         } elseif (is_null($condition)) {
             // 字段相等查询
-            $where[$field]                            = ['eq', $op];
-            $this->options['multi'][$logic][$field][] = $where[$field];
+            $where[$field] = ['eq', $op];
+            if ('AND' != $logic) {
+                $this->options['multi'][$logic][$field][] = $where[$field];
+            }
         } else {
             $where[$field] = [$op, $condition, isset($param[2]) ? $param[2] : null];
             if ('exp' == strtolower($op) && isset($param[2]) && is_array($param[2])) {