After passing through the clean barbecue oven, the flue gas is ionized by the electric field at high pressure and absorbed by the electric field at low pressure. After the oil fume accumulates to a certain amount, it will flow back to the oil pan at the bottom of the purifier. The rationality of barbecue car planning and the smokeless barbecue car created by summarizing data can win the love of shopping malls. The smokeless barbecue car is equipped with an exhaust purification device. The exhaust fan part can absorb the oil smoke generated during barbecue, and the barbecue smoke absorbed by the device passes through the low-temperature plasma purification section. After this process, the purification rate can reach more than 95%, which meets the requirements of indoor and outdoor environmental protection testing.