The sewage suction pump of Dongfeng Tianlong sewage suction truck is a double pump. The tank body is made of 5mm high-quality steel plate of Wuhan Iron and Steel, and the head is made of 6mm steel plate, which can effectively avoid the phenomenon of flat suction of the tank body and the head. The ball valves of this vehicle all use stainless steel ball valves, which not only increases the aesthetics, but also improves the corrosion resistance and anti-freeze cracking ability. The vacuum pump liner and scraper are made of wear-resistant ductile iron silicon steel by centrifugal casting, which is a high-efficiency sewage suction pump.