Smelting protection,refining,degassing and modification treatment of Mg alloy are surveyed home and abroad.The existing problem in practical production process is pointed out and the developing tendency of Mg alloy smelting process is suggested.

• 综述了国内外镁合金的熔炼保护、精炼及变质处理工艺现状；指出了现有生产工艺存在的问题，提出了未来的发展方向。