Before the attack of heart attack, the coronary arteries start to lack blood and oxygen, so it will lead to the patient’s general weakness and drowsiness, chest suffocation and coughing, pain in the precordial area, and other symptoms appear, these symptoms are also known as the precursor symptoms of the attack of heart attack. The occurrence of heart attack and coronary artery blockage, arterial ischemia, hypoxia has a certain relationship. The 5 major symptoms that appear in the body before a heart attack have a 74.5% probability of confirming the occurrence of a heart attack. However, the symptoms are atypical, so they are often overlooked, leading to a sudden aggravation of the condition. Patients may experience generalized weakness and drowsiness, chest constriction and coughing, pain in the precordial area, numbness or pain on the left side of the body, and palpitations and panic. In order to prevent the occurrence of heart attack, it is recommended that people suffering from high blood sugar, high blood pressure, high blood cholesterol, as well as long-term smoking, alcoholism, staying up all night and other bad habits of the population for regular medical checkups, and if the development of the coronary arteries have a slight blockage of the situation, it should be timely treatment measures to prevent the deterioration of the condition.