The study attempts to investigate the effects of sodium ferulate (SF) on the proliferation and collagen synthesis of the cultured human hypertrophic scar fibroblast (HSFb).After HSFb cells were cultured in vitro and SF LC₅₀ and optimal drug time were calculated with MTT method,the cells were divided into blank control group and SF intervention groups (high,medium and low concentration rates were 0.3,0.03,0.003 mg/mL,respectively).After HSFbs were cultured for 72 hours,they were observed under inverted microscope and transmission electron microscope to detect their morphological changes.The MTT test and Western blot method were used to detect the effects of SF on the cell proliferation of HSFb and the expression of collagen cells I and III.The results showed that,compared with the blank control group,the HSFb cells were significantly reduced under inverted microscope.Under the electron microscope,the results showed that the nuclei were contracted,that the mitochondria were slightly swollen,that the rough endoplasmic reticulum was expanded into vesicles,and that there were more vacuoles and autophagy.With MTT test,the results showed that SF in each concentration group can significantly inhibit the proliferation of HSFb (P<0.01);With Western blot method,the results showed that SF in high and medium concentration groups can significantly inhibit the expression collagen cells I and Ⅲ (P<0.01) of HSFb and SF in low concentration group could inhibit the expression of collagen cells I to some extent (P<0.05).The results of this study indicate that SF can transform the micro morphology of HSFb and inhibit the cell proliferation of HSFb and the expression of collagen cells of I and III.