Ventilation equipment for energy conservation and emission reduction of building

The invention discloses ventilation equipment for building energy conservation and emission reduction, and relates to the technical field of ventilation equipment, the ventilation equipment comprises an equipment box body and a first case, a transmission mechanism is arranged in the first case, the transmission mechanism comprises a first motor arranged in the first case, and the output end of the first motor is provided with a first transmission rod; the side, away from the first motor, of the first transmission rod is fixedly connected with a first fan blade, the interior of the first fan blade is fixedly connected with a first round rod, the exterior of the first round rod is fixedly connected with a first gear, the transmission mechanism enables the multiple sets of first gears to be converted into a rotating state from a static state, and a dismounting mechanism is arranged in the equipment box body. The air inlet pipe and the air outlet pipe can be closed according to actual requirements, the situation