Whether intravenous anesthesia can be used with muscle relaxants needs to be decided in conjunction with the mode of surgery as well as the mode of anesthesia. For general anesthesia with tracheal intubation, in addition to the use of intravenous sedative and analgesic anesthetics, it is also necessary to add inotropic drugs to eliminate the body’s response to intubation as well as to meet the inotropic requirements of surgery, such as intra-abdominal surgery. For simple intravenous non-intubation anesthesia, only the use of intravenous non-muscarinic drugs, this surgery is generally shorter, almost no requirement for muscle relaxation, this time may not add muscle relaxation drugs, such as saphenous vein ligation and other high ligation. Therefore, whether intravenous anesthesia can be added with muscle relaxants should be decided in conjunction with the mode of surgery.