diff --git a/frontend/src/components/console/project/files.tsx b/frontend/src/components/console/project/files.tsx
index 66d1a592..83d0914c 100644
--- a/frontend/src/components/console/project/files.tsx
+++ b/frontend/src/components/console/project/files.tsx
@@ -233,8 +233,12 @@ export const ProjectFileManager = ({ project, onFileSelect, onLoaded, className
   const [loading, setLoading] = useState(true)
   const [branches, setBranches] = useState<DomainBranch[]>([])
   const [selectedBranch, setSelectedBranch] = useState<string>('')
+  const [branchResolved, setBranchResolved] = useState(false)
+  const [branchProjectId, setBranchProjectId] = useState<string>('')
   const projectIdRef = useRef(project?.id)
   projectIdRef.current = project?.id
+  const selectedBranchRef = useRef(selectedBranch)
+  selectedBranchRef.current = selectedBranch
   const isMountedRef = useRef(true)
 
   // 文件内容对话框状态
@@ -253,8 +257,11 @@ export const ProjectFileManager = ({ project, onFileSelect, onLoaded, className
       setLoading(false)
       return
     }
+    if (!branchResolved) return
+    if (branchProjectId !== project.id) return
 
     const requestedProjectId = project.id
+    const requestedBranch = selectedBranch
     setLoading(true)
     await apiRequest('v1UsersProjectsTreeDetail', {
       recursive: false,
@@ -263,30 +270,44 @@ export const ProjectFileManager = ({ project, onFileSelect, onLoaded, className
     }, [project?.id], (resp) => {
       // 忽略过期响应：切换 project 后，旧请求可能晚于新请求返回；或组件已卸载
       if (!isMountedRef.current || projectIdRef.current !== requestedProjectId) return
+      if (selectedBranchRef.current !== requestedBranch) return
       if (resp.code === 0) {
         setEntries(sortEntries(resp.data || []))
       } else {
         setEntries([])
       }
     })
+    if (!isMountedRef.current || projectIdRef.current !== requestedProjectId) return
+    if (selectedBranchRef.current !== requestedBranch) return
     setLoading(false)
     onLoaded?.()
-  }, [project?.id, onLoaded, selectedBranch])
+  }, [project?.id, onLoaded, selectedBranch, branchProjectId, branchResolved])
 
   // 获取分支列表
   useEffect(() => {
     const fetchBranches = async () => {
-      if (!project?.git_identity_id || !project?.full_name) {
+      if (!project?.id || !project?.git_identity_id || !project?.full_name) {
         setBranches([])
+        setSelectedBranch('')
+        setBranchProjectId(project?.id || '')
+        setBranchResolved(true)
         return
       }
 
+      const requestedProjectId = project.id
       const encodedRepoName = encodeURIComponent(project.full_name)
+      setBranches([])
+      setSelectedBranch('')
+      setEntries([])
+      setLoading(true)
+      setBranchProjectId('')
+      setBranchResolved(false)
 
       await apiRequest('v1UsersGitIdentitiesBranchesDetail', {}, [project.git_identity_id, encodedRepoName], (resp) => {
+        if (projectIdRef.current !== requestedProjectId) return
         if (resp.code === 0 && resp.data) {
           setBranches(resp.data)
-          if (resp.data.length > 0 && !selectedBranch) {
+          if (resp.data.length > 0) {
             const branchNames = resp.data.map((b: DomainBranch) => b.name || '').filter(Boolean)
             let defaultBranch = ''
             if (branchNames.includes('main')) {
@@ -299,11 +320,17 @@ export const ProjectFileManager = ({ project, onFileSelect, onLoaded, className
             setSelectedBranch(defaultBranch)
           }
         }
+        setBranchProjectId(requestedProjectId)
+        setBranchResolved(true)
+      }, () => {
+        if (projectIdRef.current !== requestedProjectId) return
+        setBranchProjectId(requestedProjectId)
+        setBranchResolved(true)
       })
     }
 
     fetchBranches()
-  }, [project?.git_identity_id, project?.full_name])
+  }, [project?.id, project?.git_identity_id, project?.full_name])
 
   useEffect(() => {
     isMountedRef.current = true
@@ -321,13 +348,15 @@ export const ProjectFileManager = ({ project, onFileSelect, onLoaded, className
     
     await apiRequest('v1UsersProjectsTreeBlobDetail', {
       path: entry.path || '',
+      ref: selectedBranch || undefined,
     }, [project?.id], (resp) => {
+      if (selectedBranchRef.current !== selectedBranch) return
       if (resp.code === 0 && resp.data?.content) {
         setFileContent(b64decode(resp.data?.content))
       }
     })
     setFileLoading(false)
-  }, [project?.id])
+  }, [project?.id, selectedBranch])
 
   // 处理文件点击
   const handleFileClick = useCallback((entry: TreeEntry) => {
diff --git a/frontend/src/pages/console/user/project/overview/info-tab.tsx b/frontend/src/pages/console/user/project/overview/info-tab.tsx
index 0d68cf0c..3c96e618 100644
--- a/frontend/src/pages/console/user/project/overview/info-tab.tsx
+++ b/frontend/src/pages/console/user/project/overview/info-tab.tsx
@@ -1,7 +1,7 @@
 import { useEffect, useRef, useState } from "react"
 import { ProjectFileManager } from "@/components/console/project/files"
 import { Markdown } from "@/components/common/markdown"
-import { type DomainProject } from "@/api/Api"
+import { type DomainBranch, type DomainProject } from "@/api/Api"
 import { apiRequest } from "@/utils/requestUtils"
 import { b64decode } from "@/utils/common"
 import {
@@ -25,7 +25,58 @@ export default function ProjectOverviewInfoTab({ projectId, project }: ProjectOv
 
   const [readmeContent, setReadmeContent] = useState<string>("")
   const [readmePath, setReadmePath] = useState<string>("")
+  const [readmeRef, setReadmeRef] = useState<string>("")
+  const [readmeRefProjectId, setReadmeRefProjectId] = useState<string>("")
+  const [readmeRefResolved, setReadmeRefResolved] = useState(false)
   const [readmeLoaded, setReadmeLoaded] = useState(false)
+  const readmeRefValueRef = useRef(readmeRef)
+  readmeRefValueRef.current = readmeRef
+
+  useEffect(() => {
+    if (!project?.id || !project?.git_identity_id || !project?.full_name) {
+      setReadmeRef("")
+      setReadmeRefProjectId(project?.id || "")
+      setReadmeRefResolved(true)
+      return
+    }
+
+    const requestedProjectId = project.id
+    const encodedRepoName = encodeURIComponent(project.full_name)
+    setReadmeRefProjectId("")
+    setReadmeRefResolved(false)
+
+    apiRequest(
+      "v1UsersGitIdentitiesBranchesDetail",
+      {},
+      [project.git_identity_id, encodedRepoName],
+      (resp) => {
+        if (projectIdRef.current !== requestedProjectId) return
+        if (resp.code !== 0 || !resp.data?.length) {
+          setReadmeRef("")
+          setReadmeRefProjectId(requestedProjectId)
+          setReadmeRefResolved(true)
+          return
+        }
+
+        const branchNames = resp.data.map((b: DomainBranch) => b.name || "").filter(Boolean)
+        if (branchNames.includes("main")) {
+          setReadmeRef("main")
+        } else if (branchNames.includes("master")) {
+          setReadmeRef("master")
+        } else {
+          setReadmeRef(branchNames.sort()[0] || "")
+        }
+        setReadmeRefProjectId(requestedProjectId)
+        setReadmeRefResolved(true)
+      },
+      () => {
+        if (projectIdRef.current !== requestedProjectId) return
+        setReadmeRef("")
+        setReadmeRefProjectId(requestedProjectId)
+        setReadmeRefResolved(true)
+      },
+    )
+  }, [project?.git_identity_id, project?.full_name, project?.id])
 
   useEffect(() => {
     if (!project?.id) {
@@ -34,10 +85,16 @@ export default function ProjectOverviewInfoTab({ projectId, project }: ProjectOv
       setReadmeLoaded(true)
       return
     }
+    if (!readmeRefResolved) return
+    if (readmeRefProjectId !== project.id) return
+
     const requestedProjectId = project.id
+    const requestedReadmeRef = readmeRef
     setReadmeLoaded(false)
-    apiRequest("v1UsersProjectsTreeDetail", { recursive: false, path: "" }, [project.id], (resp) => {
+    const query = { recursive: false, path: "", ref: readmeRef || undefined }
+    apiRequest("v1UsersProjectsTreeDetail", query, [project.id], (resp) => {
       if (projectIdRef.current !== requestedProjectId) return
+      if (readmeRefValueRef.current !== requestedReadmeRef) return
       if (resp.code !== 0 || !resp.data) {
         setReadmeLoaded(true)
         return
@@ -52,8 +109,9 @@ export default function ProjectOverviewInfoTab({ projectId, project }: ProjectOv
         setReadmeLoaded(true)
         return
       }
-      apiRequest("v1UsersProjectsTreeBlobDetail", { path: readmePathVal }, [project.id as string], (r) => {
+      apiRequest("v1UsersProjectsTreeBlobDetail", { path: readmePathVal, ref: readmeRef || undefined }, [project.id as string], (r) => {
         if (projectIdRef.current !== requestedProjectId) return
+        if (readmeRefValueRef.current !== requestedReadmeRef) return
         if (r.code === 0 && r.data?.content) {
           setReadmeContent(b64decode(r.data.content))
           setReadmePath(readmePathVal)
@@ -62,7 +120,7 @@ export default function ProjectOverviewInfoTab({ projectId, project }: ProjectOv
         setReadmeLoaded(true)
       })
     })
-  }, [project?.id])
+  }, [project?.id, project?.git_identity_id, project?.full_name, readmeRef, readmeRefProjectId, readmeRefResolved])
 
   const ReadmeHeader = (
     <div className="px-4 py-2 flex items-center border-b bg-muted/50">