diff --git a/WebUI/src/api/index.js b/WebUI/src/api/index.js
index ebcb3f0..11dac60 100644
--- a/WebUI/src/api/index.js
+++ b/WebUI/src/api/index.js
@@ -2,7 +2,7 @@ import axios from 'axios'
 import { showError } from '../utils/message'
 
 /** @type {string} 默认 API 基础 URL */
-export const DEFAULT_API_BASE_URL = 'http://localhost:9949'
+export const DEFAULT_API_BASE_URL = import.meta.env.VITE_API_BASE_URL || 'http://localhost:18080'
 
 /** @type {number} 请求超时时间（毫秒） */
 export const REQUEST_TIMEOUT = 30000
diff --git a/app/core/config.py b/app/core/config.py
index 6b596a6..8a86213 100644
--- a/app/core/config.py
+++ b/app/core/config.py
@@ -15,7 +15,7 @@ class Settings(BaseSettings):
     db_path: str = "db/proxies.sqlite"
 
     # API 服务配置
-    host: str = "0.0.0.0"
+    host: str = "127.0.0.1"
     port: int = 9949
 
     # 验证器配置
diff --git a/script/start.bat b/script/start.bat
index ef21249..09bf5fd 100644
--- a/script/start.bat
+++ b/script/start.bat
@@ -4,7 +4,7 @@ echo === ProxyPool Startup ===
 echo.
 
 set "ROOT_PATH=%~dp0.."
-set "BACKEND_PORT=9949"
+set "BACKEND_PORT=18080"
 set "FRONTEND_PORT=9948"
 
 REM 1. Clean processes on ports
@@ -53,7 +53,7 @@ ping -n 3 127.0.0.1 >nul 2>&1
 set /a RETRY_COUNT+=1
 
 REM Try to connect to backend health endpoint
-powershell -Command "try { $r = Invoke-RestMethod -Uri 'http://127.0.0.1:9949/health' -TimeoutSec 2 -ErrorAction Stop; exit 0 } catch { exit 1 }" >nul 2>&1
+powershell -Command "try { $r = Invoke-RestMethod -Uri 'http://127.0.0.1:18080/health' -TimeoutSec 2 -ErrorAction Stop; exit 0 } catch { exit 1 }" >nul 2>&1
 if %errorlevel% equ 0 (
     set BACKEND_READY=1
     goto WAIT_DONE
@@ -81,7 +81,7 @@ echo   Frontend started
 echo.
 
 echo === All services started ===
-echo Backend: http://127.0.0.1:9949
+echo Backend: http://127.0.0.1:18080
 echo Frontend: http://localhost:9948
 echo.
 echo Press any key to close this window (services will keep running).
diff --git a/script/stop.bat b/script/stop.bat
index 895a33f..979c09f 100644
--- a/script/stop.bat
+++ b/script/stop.bat
@@ -3,7 +3,7 @@ chcp 65001 >nul
 echo === Stopping ProxyPool Services ===
 echo.
 
-set "BACKEND_PORT=9949"
+set "BACKEND_PORT=18080"
 set "FRONTEND_PORT=9948"
 set "STOPPED_COUNT=0"