The application relates to a detachable guide rail type
launch vehicle pre-launch heating and keeping warm device, which comprises a detaching mechanism and a heating and keeping warm mechanism; in a storage state, the detaching mechanism and the heating and keeping warm mechanism are independent of each other and are stored separately; in a heating working state, the heating and keeping warm mechanism is lifted by the detaching mechanism, and the heating and keeping warm mechanism heats and keeps warm the vehicle; and in a launch separation state, the detaching mechanism takes the heating and keeping warm mechanism away from the guide rail type launch device of the guide rail type
launch vehicle, so that the vehicle can normally leave the rail. The application can ensure normal heating and keeping warm functions before and after the small and medium-sized vehicle is erected, and can make the heating and keeping warm device reliably detach through manual or electric ways 5 minutes before the vehicle is launched, so that the normal launch of the vehicle is not affected.