Ki67 is an indicator that suggests how fast or slow a cell proliferates, and there is no uniform standard for determining how much Ki67 is a low-grade tumor. Ki67 is an antigen related to cell proliferation, its function is closely related to cell division, clinically Ki67 is mainly used to mark the cells in the proliferation cycle in pathological examination, the higher the value of Ki67, the greater the proportion of proliferating cells in the tumor, the faster the proliferation of the tumor, and the higher the degree of malignancy of the tumor. Ki67 values fluctuate between 0% and 100%. There is no standardized evaluation and judgment criteria in the world to define whether Ki67 is high or low. Several studies have shown that the threshold for defining whether Ki67 is high or low varies from as low as 1% to as high as 35%. The Ki67 value is easily affected by many factors, and the evaluation of the disease needs to be combined with other relevant examinations. It is recommended that the patient consult the doctor in a timely manner to improve the relevant examinations, and under the guidance of the doctor to correctly treat the disease.