With the increasing popularity of 4G phones, people’s life, work and entertainment have undergone tremendous changes , at the same time the problems of network security have become increasingly prominent . This article describes the 4G mobile network, analyses the security threats, and finally puts forward the corre-sponding countermeasures for those problems .%随着4G手机的普及，人们的生活、工作、娱乐方式发生了巨大的改变，但随之而来的网络安全问题也越来越突出。本文首先简要介绍了4G通信网络，然后对常见的安全威胁进行了分析，最后针对这些问题提出了应对措施。
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