Brake caliper piston

The utility model relates to the technical field of brake caliper pistons, and discloses a brake caliper piston which comprises a piston body and a first exhaust hole, the first exhaust hole is formed in the outer wall of the piston body, a first filter groove is formed in the upper hole end of the first exhaust hole, and a first dustproof breathable film is fixedly connected into the first filter groove. The first dustproof breathable film and the first metal mesh plug are arranged in the first exhaust hole, the first exhaust hole can be prevented from being blocked, when the first exhaust hole is blocked, the second exhaust hole can continue to exhaust, and the situation that air in the piston is not exhausted in time due to the fact that the exhaust holes are blocked is avoided. The phenomenon that the back face of the friction plate is impacted and the braking effect is affected due to the fact that the air pressure rises too fast is avoided, meanwhile, a second metal mesh plug is arranged to prevent larg