Breast cancer chemotherapy 8 times can kill cancer cells, but the specific effect also needs to be judged according to the patient’s condition, sensitivity of chemotherapy drugs and other aspects, some patients can achieve the effect of cure. Breast cancer is a malignant tumor that is sensitive to chemotherapy. Most breast cancer patients will undergo chemotherapy before or after surgery. However, whether it can eliminate all the cancer cells or not should be judged according to the patient’s condition. If the breast cancer belongs to the early stage, timely surgical treatment and 8 times of chemotherapy are usually able to eliminate the cancer cells and achieve a better therapeutic effect. The 5-year survival rate of early breast cancer reaches 94%. However, for advanced breast cancer patients, chemotherapy at this time can only control tumor progression and prolong survival, and it is difficult to achieve the effect of cure. Some breast cancer patients are not sensitive to chemotherapy, which can only kill a small portion of cancer cells, and their condition is likely to deteriorate. Whether early or advanced breast cancer patients, after completing standardized treatment such as chemotherapy, they should undergo regular review to monitor the recurrence of breast cancer.