The invention belongs to the technical field of couplings, in particular to a coupling for a damping motor. The coupling comprises a main body, a limiting barrel, spiral plates and damping units, wherein the main body is in a shape of a disc, a circular flange is arranged on the circumference of the upper surface of the main body, and a circular groove is formed in the center of the lower surfaceof the main body; the limiting barrel is cylindrical, the limiting barrel is connected to the center of the upper surface of the main body, a shaft I is arranged in the center of the limiting barrel,a shaft II is installed in the circular groove of the lower surface of the main body by virtue of a spline, and the shaft I and the shaft II are connected by the coupling by virtue of the damping motor; the spiral plates are located in the circular flange, and the spiral plates are uniformly connected to the outer surface of the shaft I; and the damping units are uniformly arranged between the ends of the spiral plates and the circular flange of the main body. During operation, the main body is driven to rotate by the shaft I, the limiting barrel and the shaft II are driven to rotate by the main body, and the damping buffer of the shaft I and the shaft II is realized under the matching action of the spiral plates and the damping units.