Brake caliper assembly for electronic parking braking system of vehicle

The invention discloses a brake caliper assembly for an electronic parking braking system of a vehicle, which comprises a transmission mechanism assembly and a brake caliper component. The transmission mechanism assembly is arranged in a semi-enclosed area formed by an upper cover and a shell; the transmission mechanism assembly is connected with the brake caliper component; the transmission mechanism assembly is provided with an emergency releasing mechanism; the end part of the emergency releasing mechanism extends to the outside of the shell; and power can be switched in the extending end part of the emergency releasing mechanism to enable the transmission mechanism assembly to carry out transmission. The brake caliper assembly solves the problems of inconvenient operation and the likewhen the fault of an electrical system causes wheel lock and needs to emergently release braking in the prior art. By using the brake caliper assembly, an operator can directly rotate a hexagon stud bolt on the brake caliper by using a common socket spanner to emergently release braking. The brake caliper assembly has the advantages of strong tool interchangeability, low cost, simple and convenient operation, labor saving, low requirement of operating skills and the like.