Thiourea dioxide is a stable compound, a new product to replace insurance powder, and an important intermediate of nitrogen compounds in organic and inorganic chemicals, with good stability and unique reduction. It can be used as vat dye dyeing, color stripping agent for poor dyeing surface, reduction cleaning, whitening of silk, plastic stabilizer, sensitizer for photosensitive materials. Widely used in printing and dyeing, papermaking, polymer materials, fiber industry, chemical pulp, biomass cellulose, pharmaceutical, polymerization reaction, organic synthesis, inorganic synthesis and other fields.