The utility model discloses an auxiliary device is used in thermal power plant's electricity generation, including trickle net and fan, the inside of bolt fastening at fixed shell is passed through tothe outer fringe of trickle net, fixed shell is installed in the through -hole of building by laying bricks or stones in the middle part of the wall body, fixed shell one side is through bolt fixedlyconnected with fan housing, the air outlet of fan housing passes through buckle lock joint wind channel, wind channel body mid -mounting has the fan, electromechanical case is installed through the mounting bracket to the lower extreme of fan, driving motor's output passes through the transmission shaft and connects the flabellum, the inside one side of keeping away from the flabellum of fan shell is rotated through the pivot and is connected with the direction piece, one side swing joint that the direction piece is close to driving motor has the transfer line. This auxiliary device is used in thermal power plant's electricity generation, the inside rivers of trickle net flow, absorb the heat, and the messenger gets into the inside air temperature in wind channel and reduces, and later the fan is adjusted the amount of wind, makes indoor temperature of frequency conversion keep an equitable level.