Anti-corrosion draught fan

The utility model relates to an anti-corrosion draught fan and belongs to the technical field of draught fans. The anti-corrosion draught fan solves the defects in the prior art that an anti-corrosion layer and connection screws are prone to fall off, and an impeller is corroded to be off-centre, so that the service life of a bearing is short. The anti-corrosion draught fan mainly comprises a case made of glass fiber reinforced plastic, wherein an air outlet is formed in the case; a smoke inlet pipe is arranged on the side of the case; a stainless steel impeller is arranged in the case through the bearing; the smoke inlet pipe is fixed on the case through the connection screws; and the connection screws are pre-embedded into the case made of glass fiber reinforced plastic. The anti-corrosion draught fan is mainly used for garbage disposal, and also can be used in other technical fields of air inducing.