Secure computer platform used for rail transit

The invention provides a secure computer platform used for a rail transit. The secure computer platform used for the rail transit comprises a first host device, at least one second host device, a first communication transfer device, at least one second communication transfer device, a first input/ output device, at least one second input/ output device, an Ethernet and a FlexRay bus, wherein the first input/ output device, the second input/ output device, the first network connection end of the first communication transfer device and the third network connection end of the second communication transfer device are connected with the FlexRay bus, the second network connection end of the first communication transfer device and the fourth network connection end of the second communication transfer device are connected with the Ethernet, the first host device and the first input/ output device are communicated through the Ethernet, and the second host device and the second input/ output device are communicated through the Ethernet.