Tooth extraction is an injurious surgical procedure, tension, fear, pain, etc. can lead to increased blood pressure, heart attack, etc., so patients suffering from cardiovascular system diseases need to be careful when extracting teeth. Patients with the following conditions: myocardial infarction within half a year, stroke within half a year, frequent attacks of angina pectoris, cardiac function Ⅲ ~ Ⅳ, sedentary respiration, cyanosis, double lower limb edema, etc., heart disease combined with high blood pressure, the third or the second degree of type II atrioventricular block, bifascicular block, blood pressure higher than 180/100mmHg, etc., is regarded as contraindication to tooth extraction contraindications. For patients with other cardiovascular system diseases, it is considered a relative contraindication to tooth extraction. If the patient’s condition is stable and he/she feels good about himself/herself, he/she can take drugs such as anticardiac pain before the operation, be sedated by laughing gas, use painless anesthesia under computer control, and undergo pre-extraction treatment under the supervision of cardiac electricity, blood pressure, and so on. Depending on the patient’s condition and monitoring at the time of pre-treatment, the decision to extract the tooth or to withhold extraction will be made.