With the advent of the 5G era and the increasing development of AIoT, the intelligent upgrade of human-machine interaction and Internet of Things is ushering in an explosion. The microwave radar human body sensor at the perception layer of the Internet of Things undoubtedly plays an indispensable and important role in the realization of the intelligent scene of the Internet of Things. With the help of microwave radar sensors, people can detect the movement of objects, so as to achieve functions such as people coming and lights going off, intelligent linkage and scene definition, so they are widely used in smart lighting, smart homes, smart home appliances, and smart security And other fields.