Breast cancer ki67 value is a hint of treatment trend, need to be combined with the results of immunohistochemistry to comprehensively determine the condition, can not be based on the results of the value to determine whether to do chemotherapy. Breast cancer ki67 value is the coefficient about the proliferation status of the tumor, ki67 is generally a positive indicator, the higher this indicator is, the higher the malignancy of the tumor is. Below 5% is suggestive that the patient’s treatment is relatively more stable or the degree of malignancy is relatively low. As the normal value of breast cancer ki67 should be between 0-30%, the lower the value, the better the prognosis of breast cancer. If it is higher than 30%, the more malignant the cancer cells of the breast cancer patient are, and the worse the prognosis. If the test shows that ki67 reaches 30%, there are options that can be considered for treatment with chemotherapy under the advice of a doctor. Patients with high ki67 value of breast cancer are recommended to go to the hospital in time and under the guidance of doctors for standardized treatment, and they can also eat some vegetables and fruits in their daily life, which can help to help cancer patients improve their immunity.