With the decreasing of the circumstance temperature, diesel truck should change lower freezing point diesel fuel in order to avoid paraffin deposit which makes the car fail to run normally in winter. Paraffin deposit often happens in diesel fuel filter cleaner. To avoid the paraffin deposit, in this paper, it designs a system that adapts heating method to heat diesel. It analyses its composition, working principle, technical character and experiment application. Through making experiments it proves that this equipment can improve burning purity and decreases atmosphere pollution which reduces consumption and saves fuels.