High-strength packaging box

The utility model discloses a high-strength packaging box, and relates to the technical field of packaging boxes. A high-strength packaging box comprises a box body, a cover plate is arranged at the top of the box body, a frame is fixedly connected to the bottom of an inner cavity of the box body, the top of the frame penetrates through the top of the box body, a supporting plate is arranged at the position, close to the bottom, of the inner cavity of the frame, and a pressing plate is arranged at the position, close to the top, of the inner cavity of the frame. The structure of the box body is enhanced by arranging the reinforcing plates, the buffer plates and the corner cushion blocks, so that the box body is not prone to being damaged, internal products are protected, meanwhile, the products are fixed through the pressing plates and the supporting plates, and vertical vibration of the products during transportation is relieved through buffering of the first springs and the second springs, so that the produ