Abstract:The wireless communication network has spread to the life of people, and with improving the safety of the public awareness, encryption in wireless network traffic is more and more big, the network traffic encryption has become an inevitable trend ,and its to the user and enterprise to bring the privacy and security at the same time, also bring to network safety and network traffic management challenges. This paper studies the difference between wired network and wireless network, constructs the wireless network encryption transmission environment, collects the wireless encryption network data, extracts the data link layer each kind of service characteristic and carries on the classification. The results show that the recognition rate of different services is more than 85%.