Trustable industrial control terminal and establishing method thereof

The invention relates to a trustable industrial control terminal and an establishing method thereof. A trust root is established at the industrial control terminal and serves as a trustable source of the terminal, and the trust is expanded to a startup code and a system kernel to guarantee the trust of the startup code and the system kernel; the system kernel guarantees the trust of middleware and an application so that the trust can be expanded to the middleware and the application. Two-level trust expansion is carried out, and in other words, the trust from the trust root to the application of the industrial control terminal is established. According to the establishing method, the actual running and applying situations of the industrial control terminal are fully combined, a trust root function module is designed without affecting the normal running of the industrial control terminal, and due to the fact that the safety from the trust root to the terminal application is established, the safety of the industrial control terminal can be effectively guaranteed, and the technical support is provided for improving the safety of an industrial control system.