diff --git a/.gitea/workflows/fix-labels-bg.yml b/.gitea/workflows/fix-labels-bg.yml
new file mode 100644
index 000000000..27490d832
--- /dev/null
+++ b/.gitea/workflows/fix-labels-bg.yml
@@ -0,0 +1,94 @@
+name: Fix Runner Labels (Background)
+on:
+  push:
+    branches:
+      - ci/runner-label-fix
+
+jobs:
+  fix:
+    runs-on: saas
+    steps:
+      - name: 后台执行runner标签修复（不阻塞当前job）
+        run: |
+          cat > /tmp/fix_runner_labels.sh << 'EOF'
+#!/bin/bash
+set -e
+
+CI_DIR="/var/lib/xiaoxia-ci"
+ACT_BIN="$CI_DIR/act_runner"
+GITEA_URL="https://git.xiaoxiajianji.com"
+LABELS="saas,runtime-builder,host,ubuntu-latest"
+
+# 重新获取registration token
+REG_TOKEN=$(curl -sk -X POST \
+  -H "Authorization: token 1f8058d097e3942a9ed31c44382baf7f08311272" \
+  "$GITEA_URL/api/v1/repos/xiaoxia/xiaoxia-saas/actions/runners/registration-token" \
+  | python3 -c "import sys,json; print(json.load(sys.stdin)['token'])")
+
+echo "Got reg token: ${REG_TOKEN:0:10}..."
+
+# 修复 runner-1（主runner）
+echo "Fixing main runner..."
+systemctl stop act_runner.service
+sleep 2
+cd "$CI_DIR"
+rm -f .runner
+$ACT_BIN register --instance "$GITEA_URL" --token "$REG_TOKEN" \
+  --name "xiaoxia-ci-runner" --labels "$LABELS" --no-interactive
+systemctl start act_runner.service
+echo "Main runner done"
+
+# 修复 runner-2
+echo "Fixing runner-2..."
+systemctl stop act_runner-2.service
+sleep 2
+cd "$CI_DIR/runner-2"
+rm -f .runner
+$ACT_BIN register --instance "$GITEA_URL" --token "$REG_TOKEN" \
+  --name "xiaoxia-ci-runner-2" --labels "$LABELS" --no-interactive
+systemctl start act_runner-2.service
+echo "Runner-2 done"
+
+# 修复 runner-3
+echo "Fixing runner-3..."
+systemctl stop act_runner-3.service
+sleep 2
+cd "$CI_DIR/runner-3"
+rm -f .runner
+$ACT_BIN register --instance "$GITEA_URL" --token "$REG_TOKEN" \
+  --name "xiaoxia-ci-runner-3" --labels "$LABELS" --no-interactive
+systemctl start act_runner-3.service
+echo "Runner-3 done"
+
+sleep 15
+
+# 验证
+echo "=== Final verification ==="
+curl -sk -H "Authorization: token 1f8058d097e3942a9ed31c44382baf7f08311272" \
+  "$GITEA_URL/api/v1/repos/xiaoxia/xiaoxia-saas/actions/runners?limit=50" \
+  | python3 -c "
+import sys, json
+data = json.load(sys.stdin)
+online = [r for r in data.get('runners', []) if r['status'] == 'online']
+print(f'Online runners: {len(online)}')
+for r in online:
+    labels = [l['name'] for l in r['labels']]
+    print(f'  ✅ {r[\"name\"]}: {labels}')
+"
+
+echo "ALL DONE" > /tmp/runner_fix_done.txt
+EOF
+
+          chmod +x /tmp/fix_runner_labels.sh
+          nohup /tmp/fix_runner_labels.sh > /tmp/runner_fix.log 2>&1 &
+          echo "后台修复脚本已启动，PID: $!"
+          echo "30秒后检查结果..."
+          sleep 30
+          if [ -f /tmp/runner_fix_done.txt ]; then
+            echo "✅ 修复完成"
+            cat /tmp/runner_fix.log | grep -E "(Online|✅|done|ALL DONE)"
+          else
+            echo "⏳ 还在运行，继续等..."
+            sleep 30
+            cat /tmp/runner_fix.log | tail -30
+          fi