Automatic brake block retracting mechanism, brake device and automobile

The invention discloses an automatic brake block retracting mechanism, a brake device and an automobile. The automatic brake block retracting mechanism comprises a brake block and a support, wherein areturn part is arranged between the two ends of the brake block and the support and is used for generating returning force to make the brake block to be away from the direction of a brake disc and return; the return part is a return torsion spring; the torsion spring comprises a spring body, a first spring arm and a second spring arm; the spring body is positioned on the outer side of the brake block; one end of the first spring arm is integrated with the spring body; the other end of the first spring arm is provided with a clamping joint formed by bending and is connected to a torsion springconnecting part of the brake block through the clamping joint; one end of the second spring arm is integrated with the spring body; and the other end of the second spring arm is provided with a spring tongue formed through be