The simplest way to differentiate between columnar epithelial shift and pathologic “cervical erosion” is to do colposcopy, in general, it is easy to identify the initial state of physiologic columnar epithelial shift and pathologic “cervical erosion”. This initial state of physiological columnar epithelial downward movement in the microscopy seems like a bunch of fresh grapes, but with the passage of time; downward movement of columnar epithelium in the acidic environment of the vagina and the role of a variety of pathogens, there will be varying degrees of metaplasia, a very small number of patients will be accompanied by pathologic phenomena in the process of metaplasia, the emergence of CIN or even carcinoma, then in the colposcopy can be seen in the abnormal transformation of the area, under the instructions of the microscope to take the Biopsy, under the direction of microscopy, will eventually clarify the diagnosis. In conclusion, this physiological to pathological transformation is a long-term change process, if we get “blocking” treatment at this stage, we will play a role in reducing the incidence of cervical cancer.