Objective To study the protective effect of Xinfuli Granula(XG) on acute and chronic cardiac failure in cats and rats. Methods The cat models of acute cardiac failure were established by injecting pentobarbital. Then the cat models were given XG through duodenum. After medication,hemodynamics parameters such as heart rate(HR),mean arterial pressure(MAP),left ventricular systolic pressure(LVSP),left ventricular end-diastolic pressure(LVEDP),+ dp/dtmax and cardiac output(CO) in cats were determined. The rats were divided randomly into 5 groups:the control group,the model group,the positive control group,and high-dose and Low-dose XG groups. The rat models of myocardial injury were induced by isoproterenol(20 mg/kg). The normal group and the model group were treated with normal saline(10 mL/kg) orally,the positive contral group were treated with cedilanid(0.2 mg/kg) by intravenous,the high-and low-dose XG groups were orally treated with XG(10 g/kg and 5 g/kg respectively),and the propranolol group was orally treated with propranolol(4 mg/kg),once a day for successive 8 days. Animals were sacrificed on the 9th day,then the heart was taken out and the cardiac index was calculated. The pathological changes in myocardial cells of the rats were observed under electron microscope. Results XG had no effect on hemodynamics of cats with acute cardiac failure,but had obvious protective and therapeutic effect on isoproterenol-inducedmyocardial injury and myocardial ischemia of rats. Conclusion Xinfuli Granula has good preventive effect on isoproterenol-induced myocardial injury and sub-acute cardiac failure of rats,but has no effect on acute cardiac failure of cats.