The invention discloses a ship fender device. The ship fender device comprises at least two parallel slide ways located on a quayside. Baffles are arranged at the two ends of the parallel slide ways, a pair of rollers are arranged in the parallel slide ways, the two rollers are connected through a spring buffer, each roller is hinged to one end of a supporting rod through a connecting shaft, the other ends of the supporting rods are hinged to a cylindrical ring at the same time, the cylindrical ring is fixed to a bottom plate, the bottom plate is fixedly installed on a steel frame structure, and a rubber fender is installed on the steel frame structure. According to the ship fender device, when a ship is drawn alongside, firstly, the ship makes contact with the rubber fender, the rubber fender and the ship interact, internal air is compressed to work to consume collision energy, the ship is primarily buffered, then the spring buffer is used for secondary buffering, compression springs carry out tertiary energy dissipation, when the ship collision energy is too large, air bags are inflated, and due to at least three times of energy dissipation, the energy dissipation effect is good.