At present, many gynecological hospitals and plastic surgery hospitals in China have carried out vaginal contraction. According to the anatomical structure of human pelvic floor, vagina is mainly composed of muscles and related ligaments. Perivaginal sphincter weakness or dysfunction will lead to the increase of vaginal cavity space and the relaxation of vaginal orifice. Drug therapy can't restore the elasticity of muscle tissue. Laser therapy can improve the vaginal environment, but it can't repair the sphincter around the vagina. In addition, injection and filling are unscientific. At present, relaxation can only be achieved through surgery and exercise. Minimally invasive 3D biological tape privacy tightening has been carried out in plastic surgery and gynecology, which is used to tighten vaginal cavity and vaginal orifice. Minimally invasive surgery was used in the operation, and the regenerated tissue biological belt of Jieyalefu was implanted in the sphincter and vaginal orifice of the posterior wall of vagina, so as to establish ligaments for the relaxed sphincter and vaginal orifice, restore the elasticity of sphincter and enhance muscle strength, thus achieving the purpose of effectively tightening vagina.