Novel numerical control milling machine tool cover

The invention provides a novel numerical control milling machine tool cover, relates to the technical field of machine tool protective covers, solves the problem that the inner surface of a visual panel is not easy to clean, and comprises a milling machine body provided with a main sliding rail and a bed cover arranged on the front side of the milling machine body, and the visual panel is arranged on the front side of the bed cover. The auxiliary sliding rail is embedded in the channel and slides on the main sliding rail, the protective cover drives the friction plate to be pulled back and forth, friction is formed between the protective cover and the friction wheel in the pulling process, the multiple spraying pipes are forced to drive the spraying heads to rotate on the inner side of the visual plate, and the purpose of cleaning the inner face of the visual plate while rotating is achieved. Due to the fact that the cleaning process is completed while the protective cover moves back and forth, the visual pla