Generally speaking, 1~2 weeks after leukemia chemotherapy is a dangerous period. 1~2 weeks after leukemia chemotherapy, by the influence of chemotherapy drugs, the body is prone to bone marrow suppression, at this time, the body’s white blood cells, platelets, peripheral blood red blood cells and other values drop significantly, the chances of infections, bleeding, anemia and other problems are greatly enhanced. After chemotherapy for leukemia, there are differences in the degree of reduction of blood cells among people, and the chances of experiencing weakness, anemia, infections, and other risks are also different. Therefore, after chemotherapy is completed, in order to successfully pass the danger period, routine monitoring of blood routine should be done. Once a decrease in the values of platelets, white blood cells and red blood cells is detected, it can be treated by white blood-boosting injections and platelet-boosting injections under the guidance of physicians. Specific drugs include human granulocyte stimulating factor, human thrombopoietin and so on. After chemotherapy for leukemia, treatments such as promoting hematopoiesis and anti-infection (levofloxacin) can be used to help individuals get through the danger period and enter the bone marrow recovery period smoothly, but the specific treatment plan needs to be formulated by the physician based on the individual’s sensitivity to chemotherapy, physical tolerance, and so on.