diff --git a/tcp_client.py b/tcp_client.py
new file mode 100644
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+++ b/tcp_client.py
@@ -0,0 +1,119 @@
+#!/usr/bin/env python3
+"""
+tcp_client.py — TCP 命令通道客户端
+
+用于向机载电脑的 TCP 命令服务器发送指令：
+    - STOP   : 触发紧急降落
+    - PING   : 测试连接与响应
+    - STATUS : 查询当前状态
+
+使用方式:
+    python3 tcp_client.py <server_ip> [port] [command]
+
+示例:
+    python3 tcp_client.py 192.168.1.100 9999 STOP
+    python3 tcp_client.py 192.168.1.100 9999 PING
+    python3 tcp_client.py 192.168.1.100 9999 STATUS
+"""
+
+import socket
+import sys
+import time
+
+def send_command(server_ip, port, command, timeout=2.0):
+    """
+    向 TCP 命令服务器发送指令并接收响应
+
+    Args:
+        server_ip:  机载电脑 IP 地址
+        port:       TCP 端口（默认 9999）
+        command:    指令字符串（STOP / PING / STATUS）
+        timeout:    超时时间（秒）
+
+    Returns:
+        (success: bool, response: str)
+    """
+    try:
+        # 创建 TCP 连接
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        sock.settimeout(timeout)
+        sock.connect((server_ip, port))
+        print(f"✅ 已连接到 {server_ip}:{port}")
+
+        # 发送指令（必须带换行符，与服务器协议一致）
+        sock.send(f"{command}\n".encode())
+        print(f"📨 已发送: {command}")
+
+        # 接收响应
+        response = sock.recv(1024).decode().strip()
+        print(f"📨 收到响应: {response}")
+
+        sock.close()
+        return True, response
+
+    except socket.timeout:
+        print(f"❌ 连接超时 (>{timeout}s)")
+        return False, "TIMEOUT"
+    except ConnectionRefusedError:
+        print(f"❌ 连接被拒绝: {server_ip}:{port} (服务未启动或端口错误)")
+        return False, "CONNECTION_REFUSED"
+    except Exception as e:
+        print(f"❌ 异常: {e}")
+        return False, str(e)
+
+
+def interactive_mode(server_ip, port):
+    """交互式模式：持续输入指令，直到输入 exit 退出"""
+    print(f"\n🔌 进入交互模式 (连接 {server_ip}:{port})")
+    print("可用指令: STOP, PING, STATUS, exit\n")
+
+    # 先测试连接
+    success, _ = send_command(server_ip, port, "PING", timeout=1.0)
+    if not success:
+        print("⚠️ 连接测试失败，请检查 IP 和端口")
+
+    while True:
+        try:
+            cmd = input("> ").strip().upper()
+            if cmd == "EXIT" or cmd == "QUIT":
+                print("👋 退出")
+                break
+            if cmd in ("STOP", "PING", "STATUS"):
+                send_command(server_ip, port, cmd)
+            elif cmd == "":
+                continue
+            else:
+                print(f"❌ 未知指令: {cmd}")
+        except KeyboardInterrupt:
+            print("\n👋 退出")
+            break
+        except EOFError:
+            break
+
+
+def main():
+    # 解析命令行参数
+    if len(sys.argv) < 2:
+        print(__doc__)
+        print("\n用法:")
+        print("  python3 tcp_client.py <server_ip> [port] [command]")
+        print("  python3 tcp_client.py <server_ip> [port]           # 进入交互模式")
+        print("\n示例:")
+        print("  python3 tcp_client.py 192.168.1.100 9999 STOP")
+        print("  python3 tcp_client.py 192.168.1.100 9999          # 交互式")
+        sys.exit(1)
+
+    server_ip = "192.168.31.180"
+    port = int(sys.argv[1]) if len(sys.argv) > 2 else 9999
+    command = sys.argv[2].upper() if len(sys.argv) > 3 else None
+
+    if command:
+        # 一次性模式
+        send_command(server_ip, port, command)
+    else:
+        # 交互式模式
+        interactive_mode(server_ip, port)
+
+
+if __name__ == "__main__":
+    main()
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