Abstract:Nowadays, Wi-Fi and cellular mobile network have become universal, so wireless network security is becoming more and more important. At present, the Man-in-the-the-Middle Attack on the wireless network has existed in a large amount, and it is also an attack means with a great threat. This paper discusses on the Man-in-the-the-Middle Attack of the wireless network from the aspects of the technical principle, the attack mode, and the defense methods.