Cervical cancer is the most common malignancy in women, the persistent infection of high-risk human papillomavirus(HR-HPV) is the definite cause,especially the infection of human papillomavirus 16/human papillomavirus 18(HPV16/HPV18). Some researches indicate the virus load may relate the extent of the disease, but the sample capacity is not enough to receive a conclusive conclusion. And a specific quantity or a range of virus load which closely relates to cervical intraepithelial neoplasia 2(CIN2) or worse is not studied. The aim of the study is to prove the association between the virus load and development of cervical intraepithelial neoplasias by detecting 14 types HR-HPV, and find the specific quantitative value or the range to assist physician to diagnose.