Argon gas as a gas produced in the welding process. First of all, in the welding process will produce high-frequency electromagnetic field, the time is relatively short, high-frequency electromagnetic field on the human body may be relatively small, if the frequency of the arc, may have a greater impact on the human body. Secondly, in the welding process will produce a large number of ozone and oxy-nitride, these substances have a large impact on the human body, which is also the most important hazard of argon arc welding. In the welding process may radiate radioactive gas or particles, these particles will enter the human body as a source of internal radiation, affecting human life, physical health. Finally, in the welding process, there may be burns to the eyes and other parts of the body, which may cause electro-optic ophthalmia or arc burns