This product is used in cooling of charge air in the vehicle engine supercharging system. When the cooler is working, the heating side is charged air and the cooling side is cooling water or ambient air. After supercharging, the temperature of air coming into the engine increases, the supercharged air is passing through the heating side of the charge air cooler, after the forced heat exchange and the heat is brought away by cooling water or cooled wind at the cooling side to reduce the temperature of air coming into engine cylinder, After supercharging and cooling, it can effectively promote engine intake air density to increase the air into the engine cylinder, reduce engine combustion temperature and emission of nitric oxide also reach European emission level II. Moreover, the charge air cooler can also alleviate engine heat load promote engine power or reduce fuel consumption.