The motor consists of a stator and a rotor. The stator is made by injecting a rubber bushing on the inner wall of a steel pipe, and its inner hole is a spiral with certain geometric parameters; the rotor is a screw with a hard layer. The rotor and the stator mesh with each other, and the lead difference between the two forms a spiral sealed cavity to complete the energy conversion. The helix of the motor rotor can be divided into single-end and multi-end. The fewer the number of rotor heads, the higher the speed, and the smaller the torque; the more heads, the lower the speed, and the greater the torque.