The invention relates to a shredding device for abandoned medicine packaging boxes, in particular to a quick shredding device for medical abandoned medicine packaging boxes. The technical aim to be achieved is to provide the quick shredding device which is simple in structure, easy and convenient to operate and high in practicability and is used for the medical abandoned medicine packaging boxes. In order to achieve the technical aim, the quick shredding device for the medical abandoned medicine packaging boxes is provided and comprises a bottom plate, a left frame, a first slide rail, a first slide block, a shredding frame, a rack, a second slide rail, a guide plate, a second slide block, a right frame, a fixed plate, a misshapen gear and the like. The left frame, the first slide rail, the second slide rail and the right frame are sequentially arranged on the top of the bottom plate from left to right. The guide plate is arranged on the middle portion of the right side of the left frame. A guide hole is formed in the right portion of the guide plate. By means of the shredding device, the effect of the high practicability is achieved, the structure is simple, the manufacturing cost of the device is low, meanwhile, the device is easy and convenient to operate, and workers can rapidly learn to operate the shredding device.