The invention provides a single-hardware multiple-software implementation method and device and a computer storage medium. The single-hardware multiple-software implementation method comprises the steps that first software and second software with the same function are arranged in the same hardware unit of a train control system; a first running result of the first software is compared with a second running result of the second software; when the first running result is the same as the second running result, the first running result or the second running result is output as an output result ofthe hardware unit. The single-hardware multiple-software implementation method and device and the computer storage medium can timely find the fault and handle the fault to ensure the safety of driving.