〔Abstract〕 Objective To analyze the effect of miR-148b-3p on the proliferation of keloid derived fibroblasts. Methods The expression levels of miR-148b-3p and SPARC in human keloid derived fibroblasts(HKF) and normal human fibroblasts(NFS) were analyzed by real time PCR. The expression level of SPARC protein was detected by Western blot. The effects of miR-148b-3p and SPARC on HKF proliferation were analyzed by CCK-8 method and plate clone formation. The target gene of miR-148b-3p was predicted using online analysis software, and then the luciferase reporter plasmid was constructed. The targeted binding site of miR-148b-3p and the target gene was analyzed by luciferase reporter gene method. Results miR-148b-3p was low expressed in HKF and SPARC was high expressed in HKF. Transfection of miR-148b-3p in HKF cells could down regulate the expression of SPARC and inhibit cell proliferation. Online analysis software predicted that miR-148b-3p could target the 3′-UTR binding SPARC; The results of dual luciferase reporter gene further confirmed that miR-148b-3p could target the 3′-UTR of SPARC. Transfection of SPARC eukaryotic expression plasmid into HKF transfected with miR-148b-3p could counteract the effect of miR-148b-3p and restore cell proliferation. Conclusion miR-148b-3p can inhibit the proliferation of HKF by targeting the 3′-UTR of SPARC and inhibiting its expression.