Closed protective cover of guide rail

The invention discloses a closed protective cover of a guide rail. The closed protective cover comprises a base, wherein two side vertical plates are arranged on the base, the guide rail is arranged between the two side vertical plates, a sliding block is arranged on the guide rail, a left cover plate and a right cover plate which can be opened and closed are arranged on the outer sides of the twoside vertical plates respectively, a protection cavity for protecting the guide rail is formed after the left cover plate and the right cover plate are closed, a magnetic attraction assembly is arranged at the joint of the left cover plate and the right cover plate, the left cover plate and the right cover plate are both connected with a driving assembly, and the magnetic attraction assembly comprises a magnetic attraction strip and an iron strip. According to the closed protective cover of the guide rail, the magnetic attraction assembly at the tops of the left cover plate and the right cover plate is slowly opened