The effects of Qishenyiqi dripping pill on cardiac remodeling in patients with chronic stable heart failure have not been reported. This project aims to clarify the efficacy and safety of Qishenyiqi in patients with chronic heart failure after myocardial infarction. Patients with chronic stable heart failure after myocardial infarction were selected and randomly divided into two groups: the treatment group was treated with Qishenyiqi dripping pills; The control group was given placebo treatment. After 12 months of follow-up, the effects of Qishenyiqi on cardiac remodeling and function and cardiovascular adverse events were evaluated. The results are helpful to provide a new treatment strategy for chronic heart failure.