Inflatable rubber fender (leaning ball) is to air as a medium, the use of compressed air to absorb the impact energy, so that the ship docked with the absorption of more flexible, more soft, in order to achieve the effect of anti-collision and anti-bumping. Compared with the traditional elastic rubber fender, it has the characteristics of absorbing impact energy, small counter-impact on the ship, simple installation, good elasticity, will not be deformed under the action of compression, light weight, practical and economical. In recent years, with the continuous development and growth of the shipping industry, this kind of fender is widely used in large oil tankers, ocean transportation ships, offshore facilities, marine platforms, port terminals, large docks, yachts and other fields.