If the iodine test of colposcopy is not colored, it is necessary to combine with liquid-based thin-layer cytology and HPV examination, and further take cervical tissues from the area that is not colored, and carry out pathological examination; if the examination is precancerous cervical lesions or cervical cancer, it is more serious and requires prompt treatment. If there is no abnormality in the pathologic examination, it is not serious. Colposcopy will apply iodine to the cervical tissues. Under normal circumstances, the squamous epithelium of the cervix will be colored after applying iodine, while the diseased tissues or the mucous epithelium of the cervical canal will not be colored after applying iodine, and a biopsy of the cervix for the presence of cancer needs to be performed, and the biopsy site usually needs to be performed in the unstained area. If the biopsy reveals precancerous cervical lesions or cervical cancer, early detection and treatment is more favorable to the patient’s prognosis. In addition to colposcopy, women need to undergo cervical cancer screening, such as liquid-based thin-layer cytology and HPV testing, for early detection of cervical precancerous lesions, which can stop the progression of the disease as early as possible.