Operation door of numerical control machine tool

The utility model belongs to the technical field of numerical control machine tools, and particularly relates to an operation door of a numerical control machine tool. The operation door comprises a door body and a guide rail. The guide rail is of a fold line structure and is composed of a horizontal guide rail body, an oblique guide rail body and a vertical guide rail body. The guide rail is matched with idler wheels arranged on the lower portion of the door body. The upper end face of the door body is movably connected with a supporting plate which is provided with a fixed plate, the fixed plate is connected with a pushing rod of a nitrogen spring, and the other end of the nitrogen spring is fixed at the lower end of the supporting plate. The operation door can stop at any position at will and is firmly fixed, can be conveniently operated in processing, production efficiency is improved, and the operation door can protect workers to some extent.