Myocardial infarction is a common and frequent disease in cardiology, and its symptoms are manifested as crushing chest pain with sweating, fear or near-death feeling, which is a great threat to physical and mental health. Once it occurs, complications such as papillary muscle dysfunction or rupture, heart rupture, and ventricular wall expansion tumors can occur if not effectively managed. The most important thing for patients with myocardial infarction is to do a good job of preventing myocardial infarction reoccurrence and complications. To avoid the recurrence of myocardial infarction and complications, the following tasks must be done: First, hypertension and diabetes are the high prevalence of coronary heart disease, such people should pay more attention to the treatment of the original disease, but also regular review at the clinic to effectively prevent the recurrence of heart attack. Second, lifelong medication, medication on time, take the medicine is the best way to prevent post-infarction complications or reinfarction, do not easily stop the drug, even if there are no symptoms for several years, so once the drug is stopped, the consequence is a direct result of the possible reinfarction or related complications. Third, coronary heart disease patients who have had an infarction should diversify their diet, must pay attention to the dietary balance, advocate a light diet, to eat more fish, soy products and vegetables, avoid overeating, smoking or alcohol abuse. To change the habits of life, to eliminate bad habits, regular rest and regular life. Fourth, avoid overexertion, especially avoid lifting too heavy objects. Stay emotionally stable and try to avoid too much fluctuation. Fifth, climate change should be beware, under the influence of cold or strong cold air, the coronary artery can spasm and induce acute myocardial infarction. So whenever the climate is bad, patients with coronary heart disease should pay attention to keep warm or appropriate protection. Sixth, take special care when bathing, do not bathe under the condition of full meal or hunger. The water temperature should preferably be comparable to the body temperature, the bathing time should not be too long, and patients with more serious coronary heart disease should take a bath with the help of others. Seven, post-infarction review is particularly important because the occurrence of complications after the infarction is not always present, such as cardiac insufficiency, which may not appear until one to two years later in some patients, so regular review of liver function, kidney function, cardiac ultrasound, electrocardiogram and other tests at the hospital will help to detect relevant complications early, deal with them early and prevent them from occurring. If these can be done, the chances of reoccurrence and complications in patients with myocardial infarction are greatly reduced.