ZJH-900 outer shell four-side edge wrapping machine has unique cam transmission mechanism to control pressing edge process, which makes the machine stable and reliable, improves production efficiency, reduces product friction and makes the product look smoother and more beautiful. After pre-pressing, the positioned face paper and paperboard are wrapped with two side edges, corner pressing, front and back edges, and is finished to automatically realize four side wrapping. It not only realizes high precision and fast speed, but also beautiful wrapping angle and firm wrapping edge. It is the preferred equipment for mass production of covers in the printing and packaging industry.