Recent years

China’s IoT policy support has been increasing continuously

technological innovation achievements emerged one after another

applications in various fields expanded deeply

and the industrial scale maintained rapid growth. This paper takes the IoT boundary as the entry point and discusses the solution of the security problem of the IoT. A trusted IoT boundary access system was built by IoT gateway device in which trusted computing 3.0 and a security management center were included. It provides a security barrier for various heterogeneous IoT devices by isolating network threats.