KR-109 is an environmentally friendly, high-efficiency, low-cost pretreatment compound additive integrating wetting and penetration, chelation and dispersion, and oxygen bleaching stability, which only needs to add hydrogen peroxide and caustic soda, which is convenient and fast to use. This product is mainly used for alkaline oxygen one-bath pretreatment process of cellulose fiber and its blended fabrics, including cold rolling pile process and steam steaming process.