High loading and unloading dock is designed in modern warehouse. Due to the different height and clearance between common dock and truck (including container truck and van),which makes loading and unloading vehicle(for example: fork-lift truck)can not approach the truck directly,loading and unloading work has to be done by people, Which not only wastes time and manpower ,but also seriously affects working efficiency and increases operation risk. Dacheng dock leveler is designed and manufactured aiming at overcoming above-mentioned circumstance, By which dock and truck can be connected flexibly, Making loading and unloading vehicle approach truck to load and unload the goods easily. This type of device greatly increase efficiency of loading and unloading and strengthens safety of operators and goods. It is a must for modern logistics warehouse and factory.