Xinglong twin-screw pump has no shearing and emulsifying effect in the transportation process, so it will not destroy the specific fluid properties formed in the molecular chain structure and working process, and because the transmission relies on synchronous gears, the pump has low noise, small vibration and stable operation. Because the structure of the pump body ensures that there is always pumping liquid in the working elements of the pump as the sealing liquid, the twin-screw pump has a strong self-priming ability.