It is one new kind environmental-protection agent which can be used as exchange of Sodium Hydrosulfite. It has good heat stability, high reducibility, easy operation and transportation and storage convenient. It widely applies to reduction dyes and sulfur dyes dyeing, wool and silk bleaching, disperse dyes reducing cleaning, dye vat cleaning and so on. And its also used in paper making industry as bleaching agent, deinking, waste paper deink, etc. And then its used to organic synthesis in synthetic fiber industry, additive of polythene sensitizer of photographical emulsion, noble metal recycling and separates, etc. There is no pollution during the operation.