(The design and termination method of the main functions of the 3G wireless network card based on VC++ is proposed. The main functions of the 3G wireless network card are introduced, including RAS (RemoteAccessServer) dial-up access to the Internet and short message (SMS) sending and receiving. The program code is written using Microsoft Visual C++.NET2005. Under the Windows XP SP2 platform, the verification experiment was carried out on Huawei E1750 3G network card.)