diff --git a/library/think/model/relation/BelongsTo.php b/library/think/model/relation/BelongsTo.php
index cd5c04c0..9e443d54 100644
--- a/library/think/model/relation/BelongsTo.php
+++ b/library/think/model/relation/BelongsTo.php
@@ -50,7 +50,13 @@ class BelongsTo extends OneToOne
         if ($closure) {
             call_user_func_array($closure, [ & $this->query]);
         }
-        return $this->query->where($this->localKey, $this->parent->$foreignKey)->relation($subRelation)->find();
+        $relationModel = $this->query
+            ->where($this->localKey, $this->parent->$foreignKey)
+            ->relation($subRelation)
+            ->find();
+        $relationModel->setParent(clone $this->parent);
+
+        return $relationModel;
     }
 
     /**
diff --git a/library/think/model/relation/HasMany.php b/library/think/model/relation/HasMany.php
index 2f0d30b8..2c574869 100644
--- a/library/think/model/relation/HasMany.php
+++ b/library/think/model/relation/HasMany.php
@@ -47,7 +47,14 @@ class HasMany extends Relation
         if ($closure) {
             call_user_func_array($closure, [ & $this->query]);
         }
-        return $this->relation($subRelation)->select();
+        $list   = $this->relation($subRelation)->select();
+        $parent = clone $this->parent;
+
+        foreach ($list as &$model) {
+            $model->setParent($parent);
+        }
+
+        return $list;
     }
 
     /**
diff --git a/library/think/model/relation/HasManyThrough.php b/library/think/model/relation/HasManyThrough.php
index dd6f6a55..395e7f55 100644
--- a/library/think/model/relation/HasManyThrough.php
+++ b/library/think/model/relation/HasManyThrough.php
@@ -57,6 +57,7 @@ class HasManyThrough extends Relation
         if ($closure) {
             call_user_func_array($closure, [ & $this->query]);
         }
+
         return $this->relation($subRelation)->select();
     }
 
@@ -96,8 +97,7 @@ class HasManyThrough extends Relation
      * @return void
      */
     public function eagerlyResultSet(&$resultSet, $relation, $subRelation, $closure, $class)
-    {
-    }
+    {}
 
     /**
      * 预载入关联查询 返回模型对象
@@ -110,8 +110,7 @@ class HasManyThrough extends Relation
      * @return void
      */
     public function eagerlyResult(&$result, $relation, $subRelation, $closure, $class)
-    {
-    }
+    {}
 
     /**
      * 关联统计
@@ -121,8 +120,7 @@ class HasManyThrough extends Relation
      * @return integer
      */
     public function relationCount($result, $closure)
-    {
-    }
+    {}
 
     /**
      * 执行基础查询（进执行一次）
diff --git a/library/think/model/relation/HasOne.php b/library/think/model/relation/HasOne.php
index 27627627..991a594f 100644
--- a/library/think/model/relation/HasOne.php
+++ b/library/think/model/relation/HasOne.php
@@ -50,7 +50,10 @@ class HasOne extends OneToOne
             call_user_func_array($closure, [ & $this->query]);
         }
         // 判断关联类型执行查询
-        return $this->query->where($this->foreignKey, $this->parent->$localKey)->relation($subRelation)->find();
+        $relationModel = $this->query->where($this->foreignKey, $this->parent->$localKey)->relation($subRelation)->find();
+        $relationModel->setParent(clone $this->parent);
+
+        return $relationModel;
     }
 
     /**
diff --git a/library/think/model/relation/MorphMany.php b/library/think/model/relation/MorphMany.php
index 6b1ca7b3..0e4bf6f4 100644
--- a/library/think/model/relation/MorphMany.php
+++ b/library/think/model/relation/MorphMany.php
@@ -56,7 +56,14 @@ class MorphMany extends Relation
         if ($closure) {
             call_user_func_array($closure, [ & $this->query]);
         }
-        return $this->relation($subRelation)->select();
+        $list   = $this->relation($subRelation)->select();
+        $parent = clone $this->parent;
+
+        foreach ($list as &$model) {
+            $model->setParent($parent);
+        }
+
+        return $list;
     }
 
     /**
diff --git a/library/think/model/relation/MorphOne.php b/library/think/model/relation/MorphOne.php
index 9e231d68..b564fbc8 100644
--- a/library/think/model/relation/MorphOne.php
+++ b/library/think/model/relation/MorphOne.php
@@ -56,7 +56,10 @@ class MorphOne extends Relation
         if ($closure) {
             call_user_func_array($closure, [ & $this->query]);
         }
-        return $this->relation($subRelation)->find();
+        $relationModel = $this->relation($subRelation)->find();
+        $relationModel->setParent(clone $this->parent);
+
+        return $relationModel;
     }
 
     /**
diff --git a/library/think/model/relation/MorphTo.php b/library/think/model/relation/MorphTo.php
index c6a2211b..70f1dc03 100644
--- a/library/think/model/relation/MorphTo.php
+++ b/library/think/model/relation/MorphTo.php
@@ -56,8 +56,10 @@ class MorphTo extends Relation
         // 多态模型
         $model = $this->parseModel($this->parent->$morphType);
         // 主键数据
-        $pk = $this->parent->$morphKey;
-        return (new $model)->relation($subRelation)->find($pk);
+        $pk            = $this->parent->$morphKey;
+        $relationModel = (new $model)->relation($subRelation)->find($pk);
+        $relationModel->setParent(clone $this->parent);
+        return $relationModel;
     }
 
     /**