In recent years, with the development of science and technology, fat particles injection breast augmentation and facial contour injection cosmetic has been widely used in the world, its homologation, simplicity and safety advantages make it easy for patients to accept, for the forehead is not full, temples sunken, half of the facial atrophy, facial localized depression, small breast, fat particles injection transplantation is not lost as a better soft tissue filling surgery method. The development of fat aspiration in the past 20 years has made it possible to inject fat particles for transplantation. Most scholars believe that the absorption rate of transplanted fat cells is about 40-60%. In order to improve the survival rate, some people centrifuge the fat to be transplanted first, and then divide it into three layers: surface, middle, and low. The active cell count confirms that the low layer has the most active cells, so taking the bottom layer for injection can greatly reduce the absorption rate. Clinical studies have confirmed that the fat cells can survive after injection, but there are individual differences and whether the absorption rate can be predicted remains to be studied and observed carefully over time.