Multi-functional high-pressure road washing tricycle BY-C7 has multi-functional washing operation capabilities. It is mainly used for rapid washing and cleaning of urban sidewalks, auxiliary roads, and curbstones, as well as urban paper advertisement washing, peel boxes and trash can flushing, ground dirt removal, road tiles washing, bus stop sign and public toilet flushing, etc. Work together with a small road sweeper, it can quickly clean the sidewalks and auxiliary roads with a higher work efficiency. The vehicle is small in size, light in weight, and it is easy to pass a road without any damage on sidewalk tiles, manhole covers and other public facilities. The tricycle is equipped with a work alarm device and night reflective strips, which is suitable for day and night operations. The unique “working speed mode”, “water level alarm device”, and “high and low speed adjustment” improve the work safety factor. The use of high-quality electric tricycle chassis is simple to operate and can be operated by ordinary sanitation workers.