diff --git a/apps/mtm/models.py b/apps/mtm/models.py
index bc642b8e..07b6f859 100644
--- a/apps/mtm/models.py
+++ b/apps/mtm/models.py
@@ -72,7 +72,7 @@ class Material(CommonAModel):
         ordering = ['sort', '-create_time']
 
     def __str__(self):
-        return f'{self.name}|{self.specification}|{self.model}'
+        return f'{self.name}|{self.specification if self.specification else ""}|{self.model if self.model else ""}|{self.process.name if self.process else ""}'
 
 
 class Shift(CommonBModel):
diff --git a/apps/mtm/serializers.py b/apps/mtm/serializers.py
index 3ac6a69c..d60d12d4 100644
--- a/apps/mtm/serializers.py
+++ b/apps/mtm/serializers.py
@@ -34,7 +34,7 @@ class MaterialSerializer(CustomModelSerializer):
         model = Material
         fields = '__all__'
         read_only_fields = EXCLUDE_FIELDS
-        
+
     def get_full_name(self, obj):
         return f'{obj.name}|{obj.specification if obj.specification else ""}|{obj.model if obj.model else ""}|{obj.process.name if obj.process else ""}'
 
@@ -119,12 +119,10 @@ class RouteSerializer(CustomModelSerializer):
     material_ = MaterialSerializer(source='material', read_only=True)
     process_name = serializers.CharField(source='process.name', read_only=True)
     process_cate = serializers.CharField(source='process.cate', read_only=True)
-    material_in_ = MaterialSimpleSerializer(source='material_in', read_only=True)
-    material_out_ = MaterialSimpleSerializer(source='material_out', read_only=True)
-    material_in_name = serializers.CharField(
-        source='material_in.name', read_only=True)
-    material_out_name = serializers.CharField(
-        source='material_out.name', read_only=True)
+    material_in_name = serializers.StringRelatedField(
+        source='material_in', read_only=True)
+    material_out_name = serializers.StringRelatedField(
+        source='material_out', read_only=True)
     material_out_type = serializers.CharField(
         source='material_out.type', read_only=True)
     material_out_is_hidden = serializers.BooleanField(