A caliper parking brake comprising: a caliper housing having one end on which a cylinder is formed and the other end on which a fork is formed to face the cylinder; a brake force input terminal rotatably mounted on an end of the cylinder of the caliper housing by a parking cable; a brake force switching terminal installed within the cylinder on a common axis so as to rotate together with the brake force input terminal and switching a rotative motion caused by a brake force introduced into the brake force input terminal to a straight motion; a brake force output terminal directly connected to the brake force switching terminal on a common axis and outputs the brake force switched to the straight motion by the brake force switching terminal; and a brake terminal that is disposed between the fork and the brake force output terminal and stops rotation of a brake disc using the brake force output by the brake force output terminal, wherein the brake force output terminal comprises: a piston mounted on a front end of the cylinder and pressurizing the brake disc against the fork by the straight motion transmitted from the brake force switching terminal during braking so as to perform brake; an abrasion compensation rod part mounted within the piston on a common axis, extending in an axial direction when abrasion occurs in the fork and the frictional pad of the piston and increases a distance at which the piston pressurizes the brake disc and moves, so as to compensate for abrasion; and a return spring part disposed within the cylinder on a common axis to the abrasion compensation rod part, being elastically compressed during braking and being elastically restored while the brake is released such that the abrasion compensation rod part is returned to its original position before brake, characterized in that the return spring part comprises low-pressure and high-pressure springs (27, 29). a caliper housing having one end on which a cylinder is formed and the other end on which a fork is formed to face the cylinder; a brake force input terminal rotatably mounted on an end of the cylinder of the caliper housing by a parking cable; a brake force switching terminal installed within the cylinder on a common axis so as to rotate together with the brake force input terminal and switching a rotative motion caused by a brake force introduced into the brake force input terminal to a straight motion; a brake force output terminal directly connected to the brake force switching terminal on a common axis and outputs the brake force switched to the straight motion by the brake force switching terminal; and a brake terminal that is disposed between the fork and the brake force output terminal and stops rotation of a brake disc using the brake force output by the brake force output terminal, wherein the brake force output terminal comprises: a piston mounted on a front end of the cylinder and pressurizing the brake disc against the fork by the straight motion transmitted from the brake force switching terminal during braking so as to perform brake; an abrasion compensation rod part mounted within the piston on a common axis, extending in an axial direction when abrasion occurs in the fork and the frictional pad of the piston and increases a distance at which the piston pressurizes the brake disc and moves, so as to compensate for abrasion; and a return spring part disposed within the cylinder on a common axis to the abrasion compensation rod part, being elastically compressed during braking and being elastically restored while the brake is released such that the abrasion compensation rod part is returned to its original position before brake, characterized in that the return spring part comprises low-pressure and high-pressure springs (27, 29). a piston mounted on a front end of the cylinder and pressurizing the brake disc against the fork by the straight motion transmitted from the brake force switching terminal during braking so as to perform brake; an abrasion compensation rod part mounted within the piston on a common axis, extending in an axial direction when abrasion occurs in the fork and the frictional pad of the piston and increases a distance at which the piston pressurizes the brake disc and moves, so as to compensate for abrasion; and a return spring part disposed within the cylinder on a common axis to the abrasion compensation rod part, being elastically compressed during braking and being elastically restored while the brake is released such that the abrasion compensation rod part is returned to its original position before brake, characterized in that the return spring part comprises low-pressure and high-pressure springs (27, 29).