The placenta can be preserved in the following ways: 1. The blood components contained in the placenta can be rinsed off by means of water, especially with flowing water, and the placenta can be wrapped up with film and can be placed in the refrigerator for freezing. 2. The placenta can be rinsed off with water and dried naturally, ground into powder form and taken orally if necessary. 3. The placenta can be given to a professional institution for processing to extract hematopoietic stem cells and placental biofactors for It is used to treat some congenital heart diseases, blood system diseases and congenital immune system diseases, such as lupus erythematosus. Placenta has many benefits to human body, rich in protein, hormones and various enzymes, which have many benefits to improve human immunity and strengthen human body.