Inclusion Criteria:  Age ≥ 18 years old, no gender limit; Anterior wall STEMI within 12 hours of onset (diagnostic criteria: ischemic chest pain lasting ≥30min; ST-segment elevation or new left bundle branch block in two or more adjacent leads on the ECG; with or without Elevated myocardial markers), emergency PCI treatment is planned; Infarct-related coronary vascular anatomy is suitable for PCI treatment; Agree and cooperate to participate in this research, and sign an informed consent form  Exclusion Criteria:  Past history of myocardial infarction history; The arteries related to infarction have received PCI in the past; Past CABG history; Killip grade of cardiac function ≥ grade III or cardiogenic shock; Systolic blood pressure ≤90mmHg; Bradycardia, heart rate <60 beats/min, or atrioventricular block of degree II or more; Allergic to Shexiang Tongxin Dropping Pills Past history of asthma or severe COPD; Severe liver and kidney dysfunction; Participate in other clinical trials within 3 months; Pregnancy or breastfeeding.