The recovery time for myelosuppression varies from disease to disease and from treatment to treatment, and is usually around 3 to 6 months. Bone marrow suppression is often caused by the inhibition of normal bone marrow cells due to chemotherapy, radiation therapy and various other anti-tumor treatments, and is a common side effect of chemotherapy drugs. Bone marrow suppression begins to gradually recover in 1~2 weeks, and the average time of recovery is around 3~6 months. A decrease in all three cell lines, especially neutropenia, is common with chemotherapy. Recovery from myelosuppression varies according to individual circumstances. Patients in good health can recover in 1~2 weeks after the end of chemotherapy; while the old and weak need to prolong the recovery time, and even need more than half a year to recover. During chemotherapy, nutrition should be strengthened, cytogenic drugs should be used, and blood routine should be rechecked at regular intervals. After the end of chemotherapy, attention should be paid to the prevention of anemia, infection and other complications, to promote cell production and functional recovery. If bone marrow suppression occurs, it is necessary to consult the doctor in time and follow the doctor’s instructions to standardize the treatment.