Precision part size rapid machining device

The utility model discloses a precise part dimension quick processing device, which relates to the technical field of processing tooling, and comprises a numerical control milling machine and a processing tooling movably arranged in the numerical control milling machine, three fixture block cavities are arranged in the processing tooling, and the fixture block cavities are arranged in the numerical control milling machine. And clamping block bodies are movably installed on the inner walls of the three clamping block cavities, arc rubber is installed on the surfaces of one ends of the three clamping block bodies, and two supporting plates are movably installed in the machining tool. The clamping block bodies are effectively prevented from extruding and damaging the plastic round pipe through the arc rubber, the supporting plates support the inner wall of the plastic round pipe, the plastic round pipe can be fixed, the plastic round pipe cannot shake when machined by a numerical control milling machine, winding