Sodium lignosulfonate (SLS) is yellow brown powder completely water soluble, is naturally anionic surfactant of high molecular polymer, rich in sulfa and carboxyl group and has better water-solubility, surf-activity and dispersion capacity. Could be used for construction, ceramics, mineral powder, chemical industry, textile industry (leather), metallurgical industry, petroleum industry, fire-retardant materials, rubber vulcanization, organic polymerization, also could use as animal feed additives due to its antimicrobial and preservative properties.