Waste gas guide device of surface treatment tank

The utility model relates to the field of waste gas flow guide, in particular to a waste gas flow guide device for a surface treatment tank, which adopts the technical scheme that the waste gas flow guide device comprises a flow guide box and a collecting pipe, one end of the collecting pipe is fixedly connected to one side of the flow guide box, the other end of the collecting pipe is connected with a waste gas outlet end, and a rotating shaft is rotationally connected into the flow guide box; fan blades are fixedly connected to the rotating shaft, a motor is fixedly installed on the side wall of the flow guide box, a transmission mechanism used for driving the fan blades to rotate is arranged between an output shaft of the motor and the rotating shaft, a filter plate is slidably connected to the interior of the flow guide box, and a cleaning brush is fixedly installed at the end, located below the filter plate, of the rotating shaft; the utility model has the beneficial effects that the filter plate, the ob