The screw pumping pump is divided into two parts: one is the ground part, which is collectively called the drive. It can be directly installed on the large four-way flange, mainly composed of motor, V-belt, gear and drive shaft, smooth rod clip, oil outlet tee, sucker rod packing box and reverse mechanism; The second is the downhole part, collectively known as the pump body, which is composed of a stator shell, a rotor, a limit coupling, a screen pipe, etc. The stator is downed and anchored with the tubing, and the inside is molded poured synthetic rubber, and the inner surface meshes with the rotor on the inner helix, and the cross-section is oblong-round or petal-shaped. The rotor is connected to the sucker rod, which is a moving part, which is made of high-strength steel and hard chrome plating on the machined surface. Its surface is a single-headed helix with a circular cross-section, or a multi-headed helix with a long-flattened or petal-shaped cross-section.