To observe the effect of Wenxin granules on blood pressure and R-R interval related indexes in elderly patients with high blood pressure(HBP)complicated with left cardiac insufficiency.Methods：A total of 86 cases of HBP patients with left cardiac insufficiency were divided into two groups according to random number table method，43 cases in each group.The control group was treated with oral administration of captopril tablets，and the combination group was additionally treated with Wenxin granules based on the treatment of the control group.Both groups were treated for one month.Blood pressure(systolic pressure and diastolic pressure)and R-R interval related indexes were compared between the two groups of patients before treatment and one month after treatment，and the occurrence of adverse reactions in the two groups was recorded.Results：There was no statistically significant difference in the comparison of blood pressure between the two groups before treatment(P＞0.05).The levels of blood pressure in both groups were decreased after treatment when compared with those before treatment，and the decrease in the combination group was more significant than that in the control group(P＜0.05).There was no statistically significant difference in the comparison of the R-R interval related indexes between the two groups(P ＞ 0.05).After treatment，the indexes of R-R interval were increased when compared with those before treatment in the two groups，and the increase in the combination group was more significant than that in the control group(P＜0.05).The total incidence of adverse reactions was 11.63%in the control group and 6.98%in the combination group，there being no statistically significant difference(P ＞ 0.05).Conclusion：Based on the captopril as a routine treatment，the additional application of Wenxin granules can effectively improve the level of blood pressure and improve the cardiac function of elderly patients with HBP complicated with left cardiac insufficiency，which is safe.