With the development of the internet of things，mobile internet，cloud computing and big data technology，the internet has penetrated into all aspects of social life. At the same time，cyber security has become one of the major issues related to economic development and national security. Faced with a serious cyber security situation，governments and enterprises have increased investment in cyber security. The global cyber security market continues to grow at a rapid pace，which was 81.6 billion US dollars in 2016 in 2016，up 7.9% from 2015. On the one hand，the development of the cyber security hardware and software market opened up new business. On the other hand，both of the network security services market and solutions market were growing rapidly. The future，it is expected that the global network security market will continue to expand.