0 05). In high grade squamous intraepithelial lesion (HGSIL), the differences between the laser treated group and either LLETZ or total hysterectomy groups turned into normal rate was significantly (P0 05).Conclusions Expectant treatment for CIN I is safe in a reliable patient population. LLETZ is a safe and effective treatment for HGSIL. The long-term efficacy of LLETZ should be investigated and assessed by extending the period of follow-up.