With the steady improvement of the fine management of urbanization, the image of buses has attracted much attention. While the number of buses is increasing year by year, the water consumption of car washing is also increasing. However, most of the car washing methods on the market are mainly by manpower. There are many disadvantages in this way of car washing, such as large waste of water resources, long process of car washing, large labor input, etc. This paper mainly introduces the development status of high-pressure cleaning machine at home and abroad, the main problems of high-pressure cleaning machine in the world, and puts forward a new design of bus cleaning equipment through microprocessor control, high temperature, high pressure and automatic air drying.