Clamping jaw special for machining wind power impeller and tool clamp

The utility model discloses a clamping jaw special for machining a wind power impeller and a tool clamp. The clamping jaw comprises three positioning clamping jaws, and clamping pieces are arranged on the positioning clamping jaws. Each clamping piece is provided with a set of clamping bosses distributed at intervals in the circumferential direction. The clamping boss and the positioning clamping jaw are located on the two sides of the clamping piece correspondingly. The positioning clamping jaw is provided with a first fixing hole used for installation and fixation, and correspondingly, the clamping piece is provided with a second fixing hole matched with the first fixing hole. According to the clamping jaw special for machining the wind power impeller, a positioning clamping jaw of a self-centering three-jaw hydraulic chuck is improved, and a clamping piece is arranged on the positioning clamping jaw; during use, the positioning clamping jaw is mounted on a base jaw of the self-centering three-jaw hydraulic