It is well known that smoking is harmful to health, but quitting is not an easy task. For many elective surgery patients, quitting smoking before surgery is a very important matter. Surgical procedures, which are traumatic to the body itself, often take a long time to recover. After surgery, there are sometimes unexpected complications such as lung infections, poor wound healing, and heart disease. Smoking often has a detrimental effect on the patient’s lungs, increasing the chance of lung infections; while carbon monoxide and nicotine in the blood can have adverse consequences on heart function and the circulatory system. During surgery, nicotine can raise blood pressure, increase intraoperative bleeding and cardiac burden, and may add to the cardiac circulatory system, which is already overwhelmed by surgery, anesthesia, and trauma. In addition, surgical wound healing is relatively difficult in patients who smoke. Especially in patients undergoing cardiovascular surgery and gastrointestinal anastomosis, excessive smoking can sometimes even lead to serious complications that can make the surgery unsuccessful. In general, the effects of carbon monoxide and nicotine are short-lived in the bloodstream, and the effects can be largely eliminated by abstaining from smoking for 1-2 days; in contrast, the effects of smoking on the lungs are slow and long-lasting, taking about 6-8 weeks to begin to improve. Scientific studies have confirmed that a 6-week preoperative smoking ban can lead to a significant reduction in the incidence of pulmonary complications; and a 3-week preoperative smoking ban can be beneficial in reducing surgical trauma complications. A trial was even conducted to observe the effects of a 6-8 week preoperative smoking ban. The results found that 18% of non-smokers had surgical complications, compared with 52% of non-smokers; only 5% of non-smokers had poor wound healing, compared with 31% of non-smokers. The study showed that smoking abstinence significantly reduced wound-related complications and decreased the incidence of cardiac and pulmonary complications, significantly improving surgical outcomes. Smoking has many detrimental effects on surgical patients, and it is important to quit smoking before surgery. Nevertheless, it is not easy to quit smoking before surgery, and some patients even increase their smoking. For smokers, what better way to reduce their anxiety and anxiety before surgery than to smoke? It is clear that it is equally important to strengthen psychological care to reduce patients’ preoperative anxiety and health education.