Chemotherapy can be stopped in advanced stage of cancer, and there are two cases of stopping chemotherapy. 1. chemotherapy can be stopped after a certain number of cycles, such as 4-6 cycles, and the strategy of observation and waiting can be adopted, and the next cycle of chemotherapy can be carried out after the disease progresses. 2. patients cannot tolerate further chemotherapy because of the side effects of chemotherapy, and can continue to treat the tumor by means of the best supportive therapy, palliative therapy or radiotherapy. treatment of the tumor. Chemotherapy is very strong in some tumors such as leukemia and lymphoma, that is, leukemia and lymphoma can be treated with chemotherapy to further extend the relapse-free survival time of patients, but in advanced stage, chemotherapy can be stopped appropriately according to the condition and the strategy of observation and waiting is adopted.