Cervical precancerous lesions are not cancer. Cervical precancerous lesions are high-grade cervical intraepithelial lesions that have the potential to become cancerous, but cannot be diagnosed as cancer, and are mainly caused by human papillomavirus infection. Cervical precancerous lesions can be categorized into CIN II and CIN III according to the extent of the lesion, and CIN II and CIN III are collectively referred to as high-grade intraepithelial lesions. Cervical precancerous lesions refer to high-grade cervical intraepithelial lesions with cancerous potential, and precancerous lesions may progress to cancer under the stimulation of various factors. Women are advised to undergo regular screening for cervical cancer. If abnormalities are detected during screening, further cervical tissues need to be removed for pathologic examination. Early detection and early treatment can minimize the incidence of cervical cancer. Once patients are detected with precancerous lesions, they should go to the gynecology department of regular hospitals for consultation.