Connecting structure of side plate and sliding rail of hidden rail drawer

The utility model provides a hidden rail saddle drawer side plate and slide rail connecting structure, which comprises a bottom plate, a side plate and a movable rail, the lower end of the side plate is provided with an extension plate and an installation clamping seat, the installation clamping seat is welded and fixed with the inner side of the extension plate, the installation clamping seat comprises a vertical welding part and a transverse flat plate part, and the welding part is provided with a sliding groove. The bottom plate abuts against the upper end face of the flat plate part, the movable rail abuts against the lower end face of the flat plate part, and the flat plate part is connected with a locking and separating assembly which can lock the movable rail and the installation clamping base and move synchronously. The movable rail is located under the flat plate portion of the installation clamping seat and attached to the flat plate portion, due to the fact that the installation clamping seat is su