diff --git a/library/think/db/Query.php b/library/think/db/Query.php
index 78f971cb..9a274fd5 100644
--- a/library/think/db/Query.php
+++ b/library/think/db/Query.php
@@ -733,7 +733,10 @@ class Query
         if (isset($alias) && $table != $alias) {
             if (isset($this->options['alias'][$table])) {
                 $table = $table . '@think' . uniqid();
+            } elseif ($this->gettable() == $table) {
+                $table = $table . '@think' . uniqid();
             }
+
             $table = [$table => $alias];
             $this->alias($table);
         }