The utility model relates to an anti-dry heating vapor generator and belongs to a vapor supply device. In the vapor generator, an electric heating tube is arranged in a cabinet. The vapor generator is characterized in that a temperature probe is fixed on the electric heating tube and connected with a capillary tube which passes through the cabinet to be connected with a temperature controller. The vapor generator has the advantages of effectively avoiding damages caused by dry heating to the electric heating tube by arranging the temperature probe, the capillary tube and the temperature controller, along with simple structure, safety, reliability and low maintenance cost. The anti-dry heating theory of the utility model can also be used in other like products or industries.