Abstract: Objective To investigate the effect on the accuracy of colposcopy among different cervical conversion area types for the patients of cervical intraepithelial neoplasia （CIN）. Methods 586 cases of CIN patients with abnormal cervical cancer screening identified by colposcopy from the Obstetrics and Gynecology Department of Hebei Yanda Hospital during the period of January 2019 to June 2021 were selected. Colposcopy was performed in all patients, and the sensitivity, specificity, positive predictive value, negative predictive value, and compliance rate of the colposcopy diagnosis for CIN were calculated. Results In 586 cases of CIN patients, including type Ⅰ of 315 cases, accounted for 53.75%, type Ⅱ of 170 cases, accounting for 29.01%; type Ⅲ of 101 cases, accounting for 17.24%. And 158 cases of （low-grade squamous intraepithelial lesion, LSIL）, accounting for 26.96%, and 428 cases of （low-grade squamous intraepithelial lesion, HSIL）, accounting for 73.04%. HSIL were mainly in type Ⅰ, Ⅱ, and LSIL were mainly in type Ⅲ, compared among different cervical conversion types with statistical significance （P<0.05）. But the rate of cervical cancer in type Ⅰ, Ⅱ, Ⅲ were respectively 7.62% （24/315）, 7.06% （12/170）, and 3.96% （4/101）, without different significance （χ²=1.630, P=0.443）, the sensitivity, specificity, positive predictive value, negative predictive value, and compliance rate by colposcopy for CIN compared among different cervical conversion types with statistical significance （P<0.05）. Conclusions The cervical conversion area type may affect the accuracy of colposcopy for CIN, and the diagnosis accuracy of type Ⅰ was the highest, and type Ⅲ was the lowest.