The utility model relates to an automobile brake, in particular to a quantitative returning disc brake for an electric automobile. The quantitative returning disc brake comprises a clamp body, a piston, a guide rod, rectangular rings, a piston returning assisting block, a limiting buckle, a torsional spring and a spring, wherein the piston is arranged in the clamp body; the rectangular rings are embedded between the piston and the inner wall surface of the clamp body; and a groove is formed in the center of the piston, the guide rod penetrates into the groove, the piston returning assisting block is in clearance fit with the guide rod and fixedly connected with the piston, the guide rod is fixedly connected with the clamp body, the torsional spring is tightened on the guide rod, and the right end of the torsional spring is propped against the limiting buckle. In the initial state, the spring is in a compressed state, and a preset interval is formed between the limiting buckle and the piston returning assisting block; and static friction force between the torsional spring and the guide rod is larger than elastic force of the spring and smaller than hydraulic force of an oil filling cavity. The disc brake is light in weight, can automatically and timely adjust a gap increased by wearing and performs continuous adjustment, the service life of a friction disc is prolonged, and the brake sensitivity is guaranteed.