diff --git a/backend/src/api/gitea-client.ts b/backend/src/api/gitea-client.ts
index 98571fb..6a2e5c8 100644
--- a/backend/src/api/gitea-client.ts
+++ b/backend/src/api/gitea-client.ts
@@ -58,12 +58,22 @@ export async function getRepos(): Promise<GiteaRepo[]> {
   return Array.isArray(data) ? data : [];
 }
 
-export async function getCommits(owner: string, repo: string, since?: string): Promise<GiteaCommit[]> {
+export interface GiteaBranch {
+  name: string;
+}
+
+export async function getBranches(owner: string, repo: string): Promise<GiteaBranch[]> {
+  const data = await giteaGet<GiteaBranch[]>(`/repos/${owner}/${repo}/branches?limit=50`);
+  return Array.isArray(data) ? data : [];
+}
+
+export async function getCommits(owner: string, repo: string, since?: string, branch?: string): Promise<GiteaCommit[]> {
   // 分页拉取所有 commit（每页 50，最多 10 页 = 500 条）
   const all: GiteaCommit[] = [];
   for (let page = 1; page <= 10; page++) {
     let path = `/repos/${owner}/${repo}/commits?limit=50&page=${page}`;
     if (since) path += `&since=${since}`;
+    if (branch) path += `&sha=${encodeURIComponent(branch)}`;
     const data = await giteaGet<GiteaCommit[]>(path);
     if (!Array.isArray(data) || data.length === 0) break;
     all.push(...data);
diff --git a/backend/src/sync/sync-gitea.ts b/backend/src/sync/sync-gitea.ts
index 315ad7d..82b6b9d 100644
--- a/backend/src/sync/sync-gitea.ts
+++ b/backend/src/sync/sync-gitea.ts
@@ -70,35 +70,43 @@ export async function syncGitea(): Promise<void> {
 
     for (const repo of reposToSync) {
       try {
-        // Sync commits
-        const commits = await giteaClient.getCommits(repo.owner, repo.name);
-        for (const commit of commits) {
-          const existingCommit = await db.query.gitCommits.findFirst({
-            where: eq(gitCommits.sha, commit.sha),
-          });
+        // Sync commits from all branches
+        const branches = await giteaClient.getBranches(repo.owner, repo.name);
+        const seenShas = new Set<string>();
 
-          if (!existingCommit) {
-            const userId = await resolveAuthor(
-              commit.commit.author.email,
-              null
-            );
+        for (const branch of branches) {
+          const commits = await giteaClient.getCommits(repo.owner, repo.name, undefined, branch.name);
+          for (const commit of commits) {
+            if (seenShas.has(commit.sha)) continue;
+            seenShas.add(commit.sha);
 
-            const now = new Date();
-            await db.insert(gitCommits).values({
-              id: uuid(),
-              repoName: repo.name,
-              sha: commit.sha,
-              authorEmail: commit.commit.author.email,
-              authorName: commit.commit.author.name,
-              userId,
-              message: commit.commit.message,
-              additions: commit.stats?.additions || 0,
-              deletions: commit.stats?.deletions || 0,
-              committedAt: new Date(commit.commit.author.date),
-              createdAt: now,
-              updatedAt: now,
+            const existingCommit = await db.query.gitCommits.findFirst({
+              where: eq(gitCommits.sha, commit.sha),
             });
-            recordsProcessed++;
+
+            if (!existingCommit) {
+              const userId = await resolveAuthor(
+                commit.commit.author.email,
+                null
+              );
+
+              const now = new Date();
+              await db.insert(gitCommits).values({
+                id: uuid(),
+                repoName: repo.name,
+                sha: commit.sha,
+                authorEmail: commit.commit.author.email,
+                authorName: commit.commit.author.name,
+                userId,
+                message: commit.commit.message,
+                additions: commit.stats?.additions || 0,
+                deletions: commit.stats?.deletions || 0,
+                committedAt: new Date(commit.commit.author.date),
+                createdAt: now,
+                updatedAt: now,
+              });
+              recordsProcessed++;
+            }
           }
         }
 
@@ -143,7 +151,7 @@ export async function syncGitea(): Promise<void> {
           recordsProcessed++;
         }
 
-        console.info(`[SYNC] Repo ${repo.owner}/${repo.name}: synced`);
+        console.info(`[SYNC] Repo ${repo.owner}/${repo.name}: synced (${branches.length} branches)`);
       } catch (repoErr) {
         const msg = repoErr instanceof Error ? repoErr.message : 'Unknown error';
         console.error(`[SYNC] Repo ${repo.owner}/${repo.name} failed:`, msg);