Design method of active special satellite communication terminal

The invention discloses a design method of an active special satellite communication terminal, which is characterized in that a U port is expanded on hardware, the U port is externally connected with a time calibration secret key module, and the time calibration secret key module is uniformly distributed by a satellite communication ground management station; and used for realizing active control of a satellite ground management station side on the service of the active special satellite communication terminal side, and the time calibration secret key module is used as a switch for switching a conventional satellite communication service mode and a short message service mode of the active special satellite communication terminal; a non-inductive-security mechanism is designed on software, and when the active special satellite communication terminal is in a short message service mode, the non-inductive-security mechanism is operated according to the security level of short message data, so that a terminal user