The utility model provides a suspension type rail flash butt welding thermal treatment machine, include: two clamps, two clamps stretch over respectively along rail width direction to be waited to weld being close to of rail two and waits to weld sectional position, and two clamps are forged the axle through the top and are connected, and keep insulating between two clamps, press from both sides tight drive arrangement, press from both sides tight drive arrangement respectively with move clamp and quiet clamp and be connected, push away protruding device, push away the length direction setting that the rail is followed to protruding device, just push away the protruding sword setting of pushing away of protruding device and moving between clamp and the quiet clamp, the heater, the heater setting is being moved between clamp and the quiet clamp just and is being pushed away protruding device and be connected, and controlling means. This suspension type rail flash butt welding thermal treatment machine unites two into one the flash welding with equipment for heat treatment, the equipment that has reduced takes up an area of the space, has reduced the rail welding jobs time simultaneously.