Protective device for backboard machining center

The utility model discloses a protective device for a backboard machining center, which comprises a protective casing, a sliding plate is arranged at the top end inside the protective casing, a sliding groove is arranged on the surface of the top end of the sliding plate, a sliding rail is connected inside the sliding groove in a sliding mode, and the sliding rail is fixed at the top end inside the protective casing. A connecting frame is arranged at the bottom end of the sliding plate, and a supporting plate is arranged on one side of the bottom end of the connecting frame. Through the designed supporting plate, the sliding plate, the connecting frame and the sliding rail, a back plate located in the protective machine shell is placed on the supporting plate to be supported, then the sliding plate is moved on the sliding rail, and therefore the back plate is supported and moved to a machining part, feeding is achieved, and the situation that after a traditional back plate is located in the protective machine