The invention discloses an automatic wind generating set engine room environment cleaning device which comprises a screen support, supporting plates, a filter screen, a main transmission roller, a screen releasing roller, a transmission chain wheel mechanism, a controller and a motor. The screen support is arranged on the periphery of an air inlet of an engine room and an air inlet of air cooling equipment. The supporting plates are arranged at the four opposite corners of the screen support correspondingly and fixedly connected with the screen support. The main transmission roller is arranged on one side of the corresponding air inlet. The transmission chain wheel mechanism is arranged on the supporting plate on one side of the main transmission roller. The screen releasing roller is arranged on the other side of the corresponding air inlet. One end of the filter screen is wound on and fixed to the screen releasing roller and penetrates through the bottom of the screen support. The other end of the filter screen is fixed to the main transmission roller. The controller is connected with the motor. By the adoption of the automatic wind generating set engine room environment cleaning device, blockage of the filter screen at the corresponding air inlet is effectively prevented, the cleaning period of the filter screen is prolonged, the working efficiency of a wind driven generator is improved, and the maintenance cost is reduced.