Cleaning suction truck, also called multi-function suction truck or joint dredging truck. The special part consists of extractor, drive shaft, vacuum suction pump, water-air separator, multi-way reversing valve, clean water tank, window, vacuum pressure gauge, pipeline system, etc.: used for pumping sewage, sludge slurry and mixed with suspended debris sludge, small bricks, gravel, etc.: with high suction efficiency, self-absorption and self-exhaust and direct irrigation and so on.