(AB)n block copolymerized silicone soft finish. It is self-emulsifying, no silicon spot, can be directly repair color and very low yellowing products. Can be used for overflow dyeing or cheese yarn dyeing equipment, the same can optimize the dyeing process, improve the efficiency of the environment-friendly additives. Applicable to a variety of fiber and fabric, such as cotton, polyester, nylon and wool and other applications, especially for Wei clothing cloth, polyester fleece, and worsted wool fabrics and other products.