Buffer structure of packaging box

The utility model relates to the technical field of buffering of packaging boxes, in particular to a buffering structure of a packaging box, which comprises a box body, a support frame is mounted on the box body, a clamping block is connected onto the support frame, a top cover is connected to one end of the clamping block, an air bag is mounted on one side of the top cover, a fragile bottle is connected to the bottom side of the air bag, and a buffer layer is arranged on the bottom side of the fragile bottle. A containing box is arranged on the outer side of the fragile bottle, a hydraulic rod is installed on the lower side of the containing box, a bottom plate is arranged at the bottom end of the hydraulic rod, a connecting groove is formed in the bottom plate, and one end of the connecting groove is connected with a display end. According to the device, the possibility that whether objects are stored in the device or not cannot be distinguished from the appearance is reduced, the phenomenon that the device