Downslope type ventilator

The invention discloses a downslope type ventilator, which relates to a roof ventilation device, comprising a ventilator framework; the ventilator framework is composed of steel brackets by welding and threaded connection; an outer protection plate is disposed outside the ventilator framework; a rainproof plate is disposed in the ventilator framework; the rainproof plate is horizontally disposed; a flow guide plate is disposed above each end of the rainproof plate; two oblique beams are disposed in the ventilator framework, which are close to both ends of the rainproof plate; the two oblique beams are arranged like an inverted V; the flow guide plate is fixedly connected with the oblique beam; the ventilator framework and the surface of the outer protection plate are both provided with a glass fiber reinforced plastic coating layer. The invention has large inner ventilation area, the ventilation efficiency is high and the practicability is good.