Objective To detect osteopontin (OPN) expression level of cervical cancer patients before and after chemotherapy , and explore the clinical value in the evaluation of chemotherapy efficacy .Methods 90 cases of cervical squamous cell carcinoma were treated with TP regimen ,immunohistochemical method was used to detect OPN expression before and after chemotherapy ,and studied the significance of OPN evaluation on curative effect in cancer chemotherapy .Results Before chemotherapy the positive ex-pression rate of OPN of tissue was 85 .56% ,and that after chemotherapy was 62 .22% ,the positive rate of OPN expression has sig-nificant difference before and after chemotherapy conclusion(χ2 =14 .118 ,P<0 .05) .The positive expression rate of OPN of effec-tive chemotherapy group before chemotherapy was 78 .69% ,and that after chemotherapy was 47 .54% ,there were significant differ-ences(χ2 =20 .840 ,P<0 .05) .Before chemotherapy ,the positive expression rate of OPN in ineffective chemotherapy was 100% ,af-ter chemotherapy ,it was 96 .56% ,there were no significant difference(χ2 =3 .046 ,P>0 .05) .Patients with OPN negative expres-sion rate of CR was 100% (13/13) ,OPN patients with positive expression rate of CR was 45 .46% (35/77) ,compared two groups with statistical difference (P<0 .05) .Conclusion The expression of OPN in cervical cancer tissue in the tumor is related with chemotherapy sensitivity and effect of chemotherapy .