Boat rubber fender is an important device used to protect ship hull and dock when berthing. It is usually made of rubber, has the characteristics of elasticity and wear resistance, can effectively reduce the impact of the ship and the dock collision, protect the hull from damage. Boat rubber fender according to its shape and structure can be divided into different models, common D type, L type, Q type and so on. D-type fender is usually used in linear wharf, which has better buffering performance. L-type fender is suitable for corner wharf, which can effectively protect the hull of the ship at the corner; Q fender is suitable for curved shape wharf, with better flexibility and cushioning effect. Boat rubber fender plays an important protective role in the berthing and deberthing of the ship, which can ensure the safe berthing between the ship and the dock, reduce the wear of the hull and the dock, and extend the service life of the ship. It is one of the essential equipment for the ship to dock at the dock.