There are various types of breast implant materials with different classifications. According to their contents, they can be divided into silicone gel-filled type and saline-filled type; according to their use methods, they can be divided into injection type and placement type. Generally, the silicone gel-filled type is the insertion type, and the saline-filled type is the injection type. Recently, the most clinically used and most common is the silicone gel-filled prosthesis. Generally, the silicone elastomer shell is filled with medical liquid silicone gel, usually a special polymorph of high-purity dimethicone, which is one of the materials that cause the least biological reaction in medicine. This type of implant has been widely used for cosmetic breast augmentation since the 1970s, and because of its large molecular weight and jelly-like shape, it feels close to normal human tissue. No matter how it is pinched, the silicone gel implant still keeps its original shape, and not only does it feel natural after breast augmentation, the shape will also be well maintained. It is found that silicone gel prosthesis can maintain its original elasticity and softness during long-term contact with body fluids, various anions and cations and organic substances, and will not become hard and brittle, and will not be corroded, metabolized, absorbed or decomposed, which is the ideal material for breast augmentation prosthesis recognized internationally. Experiments have found that even if the outer film of the implant is pierced with a sharp knife, the silicone gel will not flow around due to its high-strength memory characteristics, ensuring its good aggregation characteristics. With the coating intact, it does not deform even after a truck presses half of the implant, so its safety is very good after it is placed in human body.