Function-extended angle head

A function-expanded angle head comprises an angle head body and a clamping head composed of a clamping head body, a clamping nozzle and a clamping cap, a positioning center hole is formed in the rear portion of the clamping head body, a key groove in the radial direction is formed in the bottom face of the rear portion of the clamping head body, a partition plate with a through hole is arranged in the middle of an inner cavity of the clamping head body, a conical inner hole is formed in the front portion of the clamping head body, and external threads are arranged on the periphery of the front portion of the clamping head body. A centering shaft penetrating into a center hole of the angle head output shaft is arranged, the bottom face of the chuck body abuts against the end face of the angle head output shaft, the exposed end of the centering shaft is inserted into a positioning center hole in the bottom face of the chuck body, and a flat key fixed to the end face of the angle head output shaft is located in