Safety computer system for train control

The invention provides a safety computer system for train control. The safety computer system comprises a first system and a second system, which are redundant mutually. In two system processing modules, one is a master processing module, and the other is a standby processing module. Two system input modules are configured to collect external signals respectively and carry out two-out-of-two voting; and when two-out-of-two voting fails, the input modules stop working. The master processing module and the standby processing module are configured to carry out processing on the input data from the same system and carry out two-out-of-two voting; and when two-out-of-two voting of the master processing module fails, the master processing module stops working and switches to the standby processing module, the two-out-of-two voting of which is successful, for follow-up processing, and the standby processing module serves as the master processing module at the moment. Two system output modules are configured to carry out effectiveness verification on the data obtained after processing of the master processing module and carry out two-out-of-two voting; and when the two-out-of-two voting fails, the output modules stop working.