Objective To observe the therapeutic effect of cervical intraepithelial neoplasia Ⅱ( CINⅡ) associated high risk HPV with LEEP combined interferon and recombinant human interleukin -2.Methods One hundred and sixty patients with CIN Ⅱwere selected during Feb.2012 and Feb.2013.The patients were random-ly divided into four groups(40 patients in each group):the control group(LEEP),group A(LEEP united with in-terferon),group B(LEEP united with recombinant human interleukin -2)and group C(LEEP united with inter-feron and recombinant human interleukin -2).TCT,colposcope examination and HPV were reviewed ,and the curative effects , postoperative complications and negative conversion rate of HPV -DNA were compared after three and six months of the treatment .Results The cure rate and negative conversion rate of HPV -DNA in group C were 92.5%and 95%,which were significantly higher than others groups ( P<0.05) after six months of treatment .The time of wound healing ,duration of vaginal discharge and bleeding time in group C were also shorter than others groups(P<0.05).Conclusion The therapeutic effect of LEEP combined with interferon and recom-binant human interleukin -2 is superior to LEEP and LEEP united interferon or interleukin -2,which is not only shorter healing time ,but also fewer complications .The therapeutic method is worthy to be applied widely .