The heat of casting is an acute exothermic reaction caused by the inhalation of highly dispersed zinc oxide fumes produced during the smelting of copper. It has been reported that metal oxide smoke such as lead, tin, antimony, nickel, etc. can also cause this disease. Preventing the escape of metal fumes is the fundamental way to prevent casting heat. In the operation of smelting, casting, etc., it is necessary to strengthen the airtightness, install a local exhaust dust removal equipment, and recover zinc oxide. Strengthening overall ventilation and wearing smoke masks can be used as an auxiliary measure.