diff --git a/Merge/back_wzy/utils/serializers.py b/Merge/back_wzy/utils/serializers.py
new file mode 100644
index 0000000..1ed5445
--- /dev/null
+++ b/Merge/back_wzy/utils/serializers.py
@@ -0,0 +1,16 @@
+# utils/serializers.py
+from marshmallow import Schema, fields, validate, ValidationError
+
+class PostSchema(Schema):
+    user_id = fields.Int(required=True)
+    topic_id = fields.Int(required=False, allow_none=True)
+    type = fields.Str(validate=validate.OneOf(['text','image','video','document']), missing='text')
+    title = fields.Str(required=True, validate=validate.Length(min=1, max=255))
+    content = fields.Str(required=True)
+    media_urls = fields.List(fields.Url(), required=False)
+    status = fields.Str(validate=validate.OneOf(['draft','pending','published','deleted','rejected']), missing='draft')
+
+class CommentSchema(Schema):
+    user_id = fields.Int(required=True)
+    content = fields.Str(required=True, validate=validate.Length(min=1))
+    parent_id = fields.Int(required=False, allow_none=True)