5 U added into 5% Glucose Injection 500 mL, twice daily. Patients in two groups were treated for 2 weeks. After treatment, the clinical efficacy and ECG efficacy were evaluated, the frequency and duration of angina attack, cardiac function indexes, serological indexes, and neuroendocrine hormones in two groups before and after treatment were compared. Results After treatment, the clinical efficacy in the control and treatment groups were 81.08% and 94.59%, respectively, and there were differences between two groups (P < 0.05). After treatment, the ECG efficacy in the control and treatment groups were 70.27% and 91.89%, respectively, and there were differences between two groups (P < 0.05). After treatment, the frequency and duration of angina attack in two groups were significantly decreased (P < 0.05). And the frequency and duration of angina attack in the treatment group were significantly less than that in the control group (P < 0.05). After treatment, the SV, CO, and LVEF levels in two groups were significantly increased (P < 0.05). And the cardiac function indexes in the treatment group were significantly higher than those in the control group (P < 0.05). After treatment, the hs-CRP, cTnI, CK and NT-proBNP levels in two groups were significantly decreased (P < 0.05). And the serological indexes levels in the treatment group were significantly lower than those in the control group (P < 0.05). After treatment, the NE, PRA, β-EP and Ang Ⅱ levels in two groups were significantly decreased (P < 0.05). And the neuroendocrine hormones levels in the treatment group were significantly lower than those in the control group (P < 0.05). Conclusion Ulinastatin combined with meglumine adenosine cyclophosphate can effectively improve the cardiac function and protect the damaged myocardial cell in treatment of acute myocardial infarction, which also reduce the inflammatory response and neuroendocrine hormone levels."/>