Closing positioning-clip for opening of fiberboard box

The utility model relates to a close positioning clamp for paper box, which comprises a base plate, a middle partition board, the middle partition board is vertically connected on one side board surface of the base plate along the fringe of the side board of the base plate, a clamping board, one side board surface of the clamping board is connected with the fringe of the side board of the top of the middle partition board, and two opened interlocking spaces. The two opened interlocking spaces are placed on the two sides of the middle partition board and between the base plate and the clamping board; a groove is provided on the clamping board and the depth of the groove is a predetermined depth, and the groove is equipped on the connection board of the clamping board and the middle partition board. At least one sub-rib is arranged on the middle section of the wall of the side groove of a clamping groove, a gap is provided between the rear end of the sub-rib and the other side groove wall, a convex clamping part is provided on the middle partition board, and the clamping part is arranged on the end of the side board of the top of the middle partition board; and the clamping part is matched with the clamping groove of the middle partition board.