ObjectiveTo discuss the effects of coix seed extract injection on rate of tumor of C57 mice liver cancer model, tumor size, and serum IL-6. MethodsUsing chemical carcinogens diethyl nitrosamine (DEN) to establish the mice model of liver cancer, liver cancer mouse model to coix seed extract was given observation of C57 mice liver cancer model come tumor formation rate, tumor growth, and the change of serum IL-6. ResultsC57 mice after intraperitoneal injection of coix seed extract injection model of liver cancer tumor rate (55.6%) significantly lower than the DEN group (87.5%), P < 0.01; tumor diameter[(0.3±0.05) cm] was lower than that in group DEN[(0.8±0.06) cm], P < 0.01. The serum level of IL-6 in C57 mice after treated with coix seed extract significantly lower than that in group DEN (P < 0.01). ConclusionCoix seed extract can effectively inhibit the tumor rate and the growth of tumor in hepatocellular carcinoma model of C57 mice, and decrease the level of serum IL-6.