Nuclear power roof axial flow fan

The utility model discloses a nuclear power roof axial flow fan which comprises an air duct, a motor, a fan blade assembly and a rainproof cap. The nuclear power roof axial flow fan comprises a protective net used for protecting an air guide channel, and the protective net is connected with the upper end peripheral edge of an air duct and the lower end peripheral edge of a rainproof cap; the nuclear power roof axial flow fan further comprises a fastening rope, the fastening rope is used for being connected with the hanging rings, and at least one end of the fastening rope is fixed to the mounting base. The protective net can prevent birds and other organisms from flying into the air duct from the air guide channel to damage the fan blade assembly and the like, meanwhile, even if the protective net collapses after being used for a long time, the protective net cannot fall into the air duct, the rubbing problem between related structures of the protective net and the fan blade assembly can be avoided, and the p