Therefore, taking biopsy in iodine unstained area can improve the diagnosis rate; 3, colposcopy: colposcopy can magnify the lesions of cervix by 6-40 times, therefore, it can detect cervical lesions at an early stage under the instruction, so as to improve the positivity rate of cervical biopsy; 4, biopsy of cervix and cervical canal: biopsy is the most important basis for the diagnosis of cervical cancer, and the pathological diagnosis is the gold standard of diagnosis, and it can be clear that cervical cancer only can be diagnosed by obtaining the benign pathologic tissues. Only after obtaining benign pathological tissues can cervical cancer be clearly identified. If there are early symptoms of cervical cancer, such as contact vaginal bleeding, irregular vaginal bleeding, increased leukorrhea and fishy smell, you should go to the hospital for gynecological examination as early as possible, such as cervical scraping examination or colposcopy examination.