Air winch is a kind of single drum type air winch. It adopts compressed air as its power to drive air motor, driving drum via two grades gear (to reduce transmitting speed and enlarge torque) so as to lift and drag heavy cargo. Considering security, this winch is adopts manual band brake and disc brake. This winch is widely used for drilling platform, marines, minings, engineering sites, etc. to pull heavy cargo. The Air Winch is featured as follows: 1.Flexible to move forward and backward, step-less in speed control. 2. Band brake and automatic disc brake. 3.High starting torque enables start with load, with anti-overload function. 4.Small size, light weight, and mobility. 5.Anti-explosive function, reliable operation under inflammable and explosive environment. 6.Safe operation under high wet, damp conditions. 7.The newly developed automatic spooling winch, greatly lowering labor intensity, highly improving cable lifespan and working safety,