The invention relates to an automobile exhaust heating cleaning system. The automobile exhaust heating cleaning system includes a gas inlet pipe, a heating pipe, and a processing pipe; the heating pipe is a spiral coil pipe; the outer periphery of the heating pipe is coved with a hot water tank; a water inlet and a water outlet are connected to the hot water tank; lids cover and match the water inlet and the water outlet; and a plurality of cellular cleaning plates made of an exhaust processing material are arranged in the processing pipe. while the automobile exhaust heating cleaning system is used, the gas inlet pipe is connected to an automobile exhaust emission end; during cold start of the automobile, hot water should be injected into the hot water tank or water in the hot water tankshould be heated firstly, the automobile is started, exhaust enters the heating pipe via the gas inlet pipe, and the exhaust is heated to an activation threshold of the exhaust processing material byhot water in the hot water tank before entering the processing pipe, and in this way, it is ensured that the exhaust can be cleaned and processed effectively by the cleaning plates in the processing pipe.