The FZ series anti-corrosion axial flow fan adopts an external motor and belt transmission method, effectively solving the problem of gas corrosion on the fan. Anti corrosion epoxy resin is sprayed inside the fan, and in harsh environments, the fan casing and impeller can be replaced with stainless steel material. This fan is mainly used for exhaust of kiln flue, exhaust of chemical plant pipelines, and high-temperature smoke exhaust of lime kiln pipelines.