The utility model relates to a hot wind blower, comprising an electric heater and a fan outside the electric heater, wherein the fan is communicated with the electric heater via a wind tube, the electric heater via a wind tube is communicated with a thermal-insulation box of an electric dust collector. The utility model has the advantages that the utility model can be mounted on the thermal-insulation box of electric dust collector, to normally start the collector in different working conditions, to confirm de-dust effect, protect environment or the like.