The tank body of the suction truck can be made of carbon steel, stainless steel. The special part of the suction truck consists of power take-off, transmission shaft, vacuum suction pump, high-pressure forming tank, water-gas separator, oil-gas separation, multi-way reversing valve, boom, fecal valve, fecal suction gun, pipe network The system is composed of a vacuum pressure gauge, a dirty window (tube), and a hand washing device.