Softener is a kind of auxiliaries with the largest variety and dosage in dyeing and finishing. So many softener varieties, according to their chemical structure, are basically long chain fat family or polymer two categories. The long hydrocarbon chains in the molecular structure of long-chain fatty softeners can be in a state of irregular arrangement and curl, forming the flexility of the molecules. The flexility of the molecules adsorbed on the surface of the fibers plays a role of lubrication, reducing the dynamic and static friction coefficient between fibers. Therefore, the long chain fat family structure generally has a good softening effect, in the softener not only variety, and large dosage. According to their ionic properties, these softeners can be divided into anionic, cationic, non-ionic and amphoteric types. In addition, for natural oil and paraffin soft 00 agent, because they are natural lubricating substances, can also be used as a separate class, but there are also different ionic categories according to the use of emulsifier. Polymer softener mainly includes polyethylene and silicone. The variety of polyethylene softener is relatively single, the amount is less, the amount is less, the main use of silicone softener. Because the polysiloxane main chain is a very flexible spiral straight chain structure, it can be freely rotated 360 degrees, the energy required for rotation is almost zero. Therefore, the molecular structure of polysiloxane is in line with the softness mechanism of textiles, which can not only reduce the static and dynamic friction coefficient between fibers, but also reduce the surface tension of fibers with very small intermolecular force. Therefore, polysiloxane is an ideal material for textile soft finishing agent. Silicone softener is the fastest developing softener in recent years.