Abstract: By using the lever principle, some new type of anti-wind device were developed independently, such as ditch anti-upwind device, scraper-trough conveyer anti-upwind device, anti-wind window device, etc. The structure and working principle was introduced about the anti-upwind device of outburst prevention air door. When the coal and gas outburst or gas explosion occurred, under the action of the shock wave, the anti-upwind device could automatically block ventilation channels and prevent the spread of harmful gas to the other side of air door, thus it could prevent the upwind flow, effectively control the affected area, and ensure the coal mine safety production.