The invention discloses a mould base-type tooth form finishing device, which is characterized in that: lower mould bases are fixedly arranged at the bottoms of four guide posts and upper mould bases capable of vertical movement are arranged at the upper parts of the guide posts, the center of the lower mould base is provided with a longitudinal guide cylinder which is internally provided with a plunger capable of vertical movement, a lower tip is positioned in a counter bore of the plunger, and the top of the lower mould base is fixedly provided with a finishing knife the center line of whichoverlaps the center line of the lower tip; the center of the upper mould base is provided with an upper tip base which is internally provided with an upper tip, the top of the upper tip is provided with a pressure spring with the upper mould base as a spring seat, a handle the middle part of which is articulated with the upper mould base is arranged, and the front end of the handle radially passes through the upper tip base to be articulated with the upper tip. The finishing device according to the invention can achieve accurate centering for workpiece and one-step finishing formation, and has high post-finishing overall accuracy.