diff --git a/backend/app/schemas/course.py b/backend/app/schemas/course.py
index 781b532..9f01f28 100644
--- a/backend/app/schemas/course.py
+++ b/backend/app/schemas/course.py
@@ -175,15 +175,15 @@ class CourseMaterialCreate(CourseMaterialBase):
     @field_validator("file_type")
     def validate_file_type(cls, v):
         """验证文件类型
-        支持格式：TXT、Markdown、MDX、PDF、HTML、Excel、Word、CSV、VTT、Properties
+        支持格式：TXT、Markdown、MDX、PDF、HTML、Excel、Word、PPT、CSV、VTT、Properties
         """
         allowed_types = [
             "txt", "md", "mdx", "pdf", "html", "htm",
-            "xlsx", "xls", "docx", "doc", "csv", "vtt", "properties"
+            "xlsx", "xls", "docx", "doc", "pptx", "ppt", "csv", "vtt", "properties"
         ]
         file_ext = v.lower()
         if file_ext not in allowed_types:
-            raise ValueError(f"不支持的文件类型: {v}。允许的类型: TXT、Markdown、MDX、PDF、HTML、Excel、Word、CSV、VTT、Properties")
+            raise ValueError(f"不支持的文件类型: {v}。允许的类型: TXT、Markdown、MDX、PDF、HTML、Excel、Word、PPT、CSV、VTT、Properties")
         return file_ext