Composite heat tracing infusion tube for vehicle and preparation method of composite heat tracing infusion tube

The invention discloses a composite heat tracing infusion tube for a vehicle and a preparation method of the composite heat tracing infusion tube, and belongs to the technical field of electric heat tracing. The composite heat tracing infusion tube for the vehicle sequentially comprises an infusion tube body, conductive buses, PTC heating plastic, an insulating layer and an anti-corrosion outer sleeve from inside to outside, the outer layer of the infusion tube body of the composite heat tracing infusion tube for the vehicle is wrapped by the PTC heating plastic, and the two strands of conductive buses which are parallel and opposite with the infusion tube body as the center penetrate through the PTC heating plastic. The PTC heating plastic is wrapped by an insulating layer, and the insulating layer is wrapped by an anti-corrosion jacket. The device is high in practicability, safe and environmentally friendly, and freezing and blocking of adblue or other solutions at the low temperature are effectively avoide