Information transmission method of spacecraft

The invention discloses an information transmission method of a spacecraft. The information transmission method comprises the following steps that: when a numerical control computer works normally, the numerical control computer receives telemeasuring data acquired by a remote unit and telemeasuring data provided by the control computer per se, the numerical control computer also receives telemeasuring data of a loading task processing unit, carries out telemeasuring formatting on all the received telemeasuring data to generate whole spacecraft telemeasuring data and outputs the whole spacecraft telemeasuring data to the remote unit A, and the remote unit A finishes information source encryption of the whole spacecraft telemeasuring data and outputs the encrypted information sources to a measurement and control responder; and when the numerical control computer works abnormally, the remote unit A directly outputs the acquired telemeasuring data and the telemeasuring data generated by the remote unit A per se to the measurement and control responder for downloading all the telemeasuring data. The information transmission method disclosed by the invention realizes backup of a key telemeasuring information transmission path of the spacecraft, thereby ensuring continuous monitoring of the ground on working states of key equipment of the spacecraft and improving the information transmission reliability.