diff --git a/android/src/main/java/com/xiarui/ch934x_serial/Ch934xSerialPlugin.java b/android/src/main/java/com/xiarui/ch934x_serial/Ch934xSerialPlugin.java
index 4eb9ce2..306ba32 100644
--- a/android/src/main/java/com/xiarui/ch934x_serial/Ch934xSerialPlugin.java
+++ b/android/src/main/java/com/xiarui/ch934x_serial/Ch934xSerialPlugin.java
@@ -371,6 +371,15 @@ public class Ch934xSerialPlugin implements FlutterPlugin, MethodCallHandler, Act
         // 注意：不注册 IDataCallback — SDK 在有回调注册时会通过回调
         // 投递数据并释放内部缓冲区，导致 readData() 返回空。
         // 通过 dataStream 轮询 readData() 拉取数据。
+
+        // 配置串口参数：115200, 8数据位, 1停止位, 无校验, 关闭流控
+        try {
+            CH934XManager.getInstance().setSerialParameter(
+                    activeDevice, activeSerialNumber, 115200, 8, 1, 0, false);
+        } catch (Exception ignored) {
+            // 设置失败不影响串口使用（使用芯片默认值）
+        }
+
         ensureModemCallback();
         return true;
     }
diff --git a/test/ch934x_serial_test.dart b/test/ch934x_serial_test.dart
index 378855e..caf98c4 100644
--- a/test/ch934x_serial_test.dart
+++ b/test/ch934x_serial_test.dart
@@ -79,7 +79,7 @@ class _MockCh934xSerialPlatform extends Ch934xSerialPlatform
   Future<bool> requestUsbPermission(int deviceId) async => true;
 
   @override
-  Future<Uint8List> read(int length) async => readBytes ?? Uint8List(0);
+  Future<Uint8List> read(int length, {int? serialPortIndex}) async => readBytes ?? Uint8List(0);
 
   @override
   Future<int> write(Uint8List data) async => writeResult;