OBJECTIVE To study the influence of Matrine on the proliferation of cultured human pterygium fibroblasts(HPF).METHODS Colorimetry MTT was used to detect viability of Matrine at different concentrations(0.1,0.2,0.4,0.8,1.6,3.2,6.4 and 12.8 mg/ml)at different time(24,48 hours)for inhibition of proliferation of HPF.RESULTS Administration of 0.4~12.8 mg/ml Matrine for 24~48 h could significantly inhibit HPF proliferation in a dose dependent manner(P0.05).There was obvious inhibitory effects of Matrine on HPFs in the concentration of 0.4 mg/ml for 24 h(P0.05,the rate of inhibition is 22.93 %),and was more evident in the concentration of 0.4 mg/ml for 48 h(P0.01,the rate of inhibition is 30.59 %)as compared with control group.The 50 % inhibitory concentration(IC50)of Matrine was 1.8115 mg/ml.CONCLUSIONS There was a remarkable inhibitory effect of Matrine on HPFs,in a time-dependent and dose-dependent manner.