Marine fenders are made of environmentally friendly materials and new polymer materials with high elastic modulus, which have high strength, elasticity, adhesion, maximum impermeability, aging resistance, and can ultimately achieve high economic value. Polyurethane floating fender is a kind of fender that uses light and high elastic foam as the buffer medium. It has a better floating fender system than inflatable fender, and is widely used in port, offshore and ship berthing operations