Umbilical cord blood can be used for hematopoietic stem cell transplantation. Umbilical cord blood is the blood that remains in the umbilical cord of the placenta after the umbilical cord is ligated and separated at the time of birth of a newborn baby, in which there are a large number of immature hematopoietic stem cells, which can be used to treat the human body’s hematological disorders, diseases occurring in the immune system, as well as congenital multiple dangerous diseases, and has a therapeutic effect on a wide variety of diseases, such as leukemia, lymphatic disease, anemia disorders, and many other diseases. Umbilical cord blood can be stored for a long time, and can be used at any time without being contaminated by other drugs or the environment. Scientifically, umbilical cord blood can also resist aging of the human body, and has a certain effect on cancer and nerve damage. Umbilical cord blood has become an important source of hematopoietic stem cells, especially like no blood relationship, it is extraordinarily precious, umbilical cord blood can only be collected when the baby is just born, so there are fewer chances in a lifetime.