The survival time of children and adolescents after leukemia cure is determined by a combination of factors such as the type of leukemia, the presence of complications, and whether the leukemia recurs. Leukemia is a common malignancy of the hematological system and is usually treated by chemotherapy, immunotherapy, hematopoietic stem cell transplantation and bone marrow transplantation. If the child is well treated and has been completely cured, it usually does not affect the length of life. However, long-term complications such as solid tumors, lymphoma and pulmonary fibrosis after bone marrow or hematopoietic stem cell transplantation will usually shorten the life expectancy of the child, although there are no clinical statistics on the exact survival time. If the child’s leukemia is more malignant, the survival time will be reduced accordingly. Since the cure rate of leukemia after relapse is low, after the leukemia is cured, the child should pay attention to rest, ensure a good diet, perform appropriate physical exercise, improve self-resistance, prevent colds and flu, and prevent the relapse of the disease.