Novel numerical control machine tool guide rail protective cover

The utility model relates to the technical field of numerically-controlled machine tools, in particular to a novel numerically-controlled machine tool guide rail protective cover which limits the telescopic movement process of devices through a limiting device, and reduces equipment abrasion and vibration caused by relative deviation of the devices in the movement process. Metal scraps and powder accumulated on the top are removed through a brush strip in the telescopic movement process of the limiting device, lubricating connection is provided for the limiting device through a lubricating device, the service life of the limiting device is prolonged, and the practicability of the device is improved; comprising a machine tool table top, a transverse moving platform and mounting frames, a guide rail is arranged on the upper end face of the machine tool table top and connected with the transverse moving platform, and the two ends of the guide rail are each provided with one mounting frame; comprising a limiting