The data and continuous operation of the application of medical Internet of Things are attractive , it has gradually become an important target of network hacking. This paper first analyzes the layered architecture of medical Internet of Things, then analyzes the security risks faced by each layer, and finally puts forward the security control strategy of medical Internet of Things. The purpose of this study are to improve the security of the medical Internet of Things and provide a reference scheme for the protection of medical data and the continuity of medical business.