diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index eed635cf..bc37ed8c 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -25,6 +25,7 @@ dependencies = [
     
     # 文件处理
     "PyMuPDF>=1.24.0",
+    "markdown>=3.6",
     # 编码检测（支持非UTF-8编码的文本文件）
     "charset-normalizer>=3.0.0",
     "chardet>=5.0.0",
diff --git a/backend/uv.lock b/backend/uv.lock
index 6918e2ba..0095a32e 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -1147,6 +1147,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/6c/77/d7f491cbc05303ac6801651aabeb262d43f319288c1ea96c66b1d2692ff3/lxml-6.0.2-pp311-pypy311_pp73-win_amd64.whl", hash = "sha256:27220da5be049e936c3aca06f174e8827ca6445a4353a1995584311487fc4e3e", size = 3518768, upload-time = "2025-09-22T04:04:57.097Z" },
 ]
 
+[[package]]
+name = "markdown"
+version = "3.10.2"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/2b/f4/69fa6ed85ae003c2378ffa8f6d2e3234662abd02c10d216c0ba96081a238/markdown-3.10.2.tar.gz", hash = "sha256:994d51325d25ad8aa7ce4ebaec003febcce822c3f8c911e3b17c52f7f589f950", size = 368805, upload-time = "2026-02-09T14:57:26.942Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/de/1f/77fa3081e4f66ca3576c896ae5d31c3002ac6607f9747d2e3aa49227e464/markdown-3.10.2-py3-none-any.whl", hash = "sha256:e91464b71ae3ee7afd3017d9f358ef0baf158fd9a298db92f1d4761133824c36", size = 108180, upload-time = "2026-02-09T14:57:25.787Z" },
+]
+
 [[package]]
 name = "markupsafe"
 version = "3.0.3"
@@ -1282,6 +1291,7 @@ dependencies = [
     { name = "flask" },
     { name = "flask-cors" },
     { name = "gunicorn" },
+    { name = "markdown" },
     { name = "openai" },
     { name = "pydantic" },
     { name = "pyjwt" },
@@ -1317,6 +1327,7 @@ requires-dist = [
     { name = "flask-cors", specifier = ">=6.0.0" },
     { name = "graphiti-core", marker = "extra == 'graphiti'", specifier = "==0.28.2" },
     { name = "gunicorn", specifier = ">=22.0.0" },
+    { name = "markdown", specifier = ">=3.6" },
     { name = "neo4j", marker = "extra == 'graphiti'", specifier = ">=5.26.0" },
     { name = "openai", specifier = ">=1.0.0" },
     { name = "pipreqs", marker = "extra == 'dev'", specifier = ">=0.5.0" },