The length of life after chemotherapy for breast cancer is mainly related to the stage of breast cancer and the effect of chemotherapy treatment for the patient. It should be analyzed on a case-by-case basis and cannot be generalized. For early stage breast cancer patients, if surgery is performed in time to remove the cancerous lesion, and if necessary, chemotherapy is used to control the spread of cancer cells, most patients have a good prognosis after treatment, and some of them can even achieve a cure. However, how long a patient can live after chemotherapy still needs to be judged according to the patient’s sensitivity and tolerance to chemotherapy drugs. If patients are insensitive or even intolerant to chemotherapy, the prognosis will be poor and survival will be shortened accordingly. In conclusion, the survival period after chemotherapy for breast cancer varies from person to person. It is recommended that when breast cancer is clearly diagnosed, surgery should be chosen if possible to increase the cure rate. For patients who are not eligible for surgery, chemotherapy, targeted therapy and immunotherapy can be used to control the disease according to the specific condition, which can also effectively prolong the survival period.