In view of the condensed water droplets falling into the ground in winter, the automobile exhaust pipe in the cold area brings hidden dangers to the urban traffic safety. The research on the development of the car exhaust pipe condensate on-board treatment device is carried out. The reaction process of engine combustion and the main components of exhaust gas were analyzed. The working principle of ultrasonic suspension device was introduced. The temperature of automobile exhaust gas was measured by experiment. The COMSOL particle tracking module was used to simulate the acoustic suspension exhaust gas.