Fixed-length cutter mounting device of numerical control milling machine

The invention relates to a fixed-length cutter mounting device of a numerical control milling machine. The device comprises a connector, a detachable mounting cylinder is installed at the tail end of the connector, a mounting plate is fixed to the tail end of the mounting cylinder, a plurality of clamping arms capable of moving in the radial direction are arranged at the tail end of the mounting plate, clamping blocks are arranged at the tail ends of the clamping arms respectively, an ejector plate capable of adjusting a vertical position is arranged in the center of the tail end of the mounting plate, a plurality of reinforcing arms capable of swinging in the radial direction are arranged on the periphery of the mounting cylinder, reinforcing seats capable of adjusting a radial position are arranged on the sides, close to the clamping arms, of the tail portions of the reinforcing arms correspondingly, and reinforcing clamps capable of swinging up and down are hinged to the sides, close to the clamping arms,