The utility model discloses a handpiece for manufacturing a plastic pipe fitting. The handpiece comprises a core die and a die body, wherein a material inlet channel is arranged on the die body and is communicated with an extrusion channel formed between the core die and the die body; and a melt enters from the material inlet channel and is extruded out of the extrusion channel, so that a pipe blank is formed. The handpiece is characterized by also comprising an air blowing pipe and an air extracting pipe which are positioned in the core die; one end of the air blowing pipe is led into the pipe blank, and the other end of the air blowing pipe is connected with an air fan arranged outside the core die; and one end of the air extracting pipe is led into the pipe blank, and the other end of the air extracting pipe is connected with an exhaust fan arranged outside the core die. The handpiece has the advantages that the inner surface of the pipe blank is quickly cooled, the production speed is increased, the using amount of cooling water is reduced, and the energy consumption is reduced; and moreover, melt dropping of the pipe fitting is improved, the smoothness of the inner surface of the pipe fitting is improved, and the quality of the pipe fitting is improved.