Natural ventilation dust remover for roof

The utility model relates to a natural ventilation dust remover for a roof, which comprises a roof support frame, an outer protecting plate, an inclined bottom plate, a ventilation air outlet, a roof surface ventilation opening and an electric switch mechanism, wherein a position on the roof support frame adjacent to the ventilation air outlet is provided with a dust removal air outlet, a position at the upper part of the roof support frame corresponding to the ventilation air outlet and the dust removal air outlet is provided with a rain shielding plate, a ventilation regulating valve plate and a dust removal regulating valve plate are arranged at the ventilation air outlet part and the dust removal air outlet part, a flow guide plate is arranged on the roof support frame, a flow guide region, a horizontal through flow capacity expansion region and a back-turning dust removal region are respectively positioned between the roof surface ventilation opening and the flow guide plate, between the rain shielding p