Nickel carbonyl powder is very toxic because it is volatile, soluble in adipose tissue, easily enters the cell membrane, and has strong binding power to proteins and nucleic acids. It has a stimulating effect on the respiratory tract and has a systemic toxic effect, which can cause lung, liver, and brain damage. If pulmonary edema is not rescued in time, it can cause death. Among nickel workers, the incidence of respiratory cancer is higher than that of the general population. According to statistics, the incidence of lung cancer is 2.6 to 16 times higher, and nasal cancer is 37 to 196 times higher.