diff --git a/src/model/Pivot.php b/src/model/Pivot.php
index 44cf2243..c77903c5 100644
--- a/src/model/Pivot.php
+++ b/src/model/Pivot.php
@@ -13,6 +13,7 @@
 
 namespace think\model;
 
+use think\helper\Str;
 use think\Model;
 
 /**
@@ -26,6 +27,11 @@ class Pivot extends Model
      * @var Model
      */
     public $parent;
+
+    /**
+     * 中间表名称.
+     * @var string
+     */
     protected $pivotName;
 
     /**
@@ -56,8 +62,8 @@ public function __construct(array $data = [], ?Model $parent = null, string $tab
      */
     protected function init() 
     {
-        if (is_null($this->getOption('name'))) {
-            $this->setOption('name', $this->pivotName);
+        if (null === $this->getOption('name')) {
+            $this->setOption('name', $this->pivotName ?: Str::snake(class_basename(static::class)));
         }
     }