Closed low-voltage switch cabinet profile

The utility model discloses a closed low-voltage switch cabinet section bar, which comprises a section bar body, a base fixedly mounted at the bottom of the section bar body, a back plate fixedly arranged on the back of the section bar body, a top cover fixedly arranged at the top of the section bar body, a movable side plate movably arranged on the side edge of the section bar body, and reinforcing ribs arranged on two sides of the front of the back plate. The two sets of reinforcing ribs are transversely arranged, an electric guide rail is fixedly connected to the middle of the reinforcing ribs, a movable block is movably arranged in the middle of the electric guide rail, a dust collection mechanism is fixedly connected to the front face of the movable block, and a circular protection cover is fixedly connected to the outer side of the dust collection mechanism. According to the utility model, the movable side plate, the back plate and the top cover are respectively arranged on the side wall, the back surfa