Postoperative wound recovery is one of the keys to disease recovery, and a wound with problems can prolong hospitalization and affect overall disease treatment. Factors affecting wound healing mainly include: 1, age: the older the age, the slower the wound healing. 2. Nutrition: Lack of protein, vitamins and trace elements will delay wound healing if they cannot provide the nutrition needed for tissue regeneration. Trace elements related to wound healing are copper and zinc, vitamins such as vitamin A, vitamin C and vitamin E. These substances are generally not deficient in the normal human body. However, the need for wound healing greatly exceeds the usual amount, coupled with the patient’s poor appetite and less food intake, which can also cause an oversupply. Beijing Tsinghua Changgeng Hospital Thoracic Surgery Department Cao Gashun 3, infection: when the wound is infected, there is a lot of exudate, which can crack the wound that is healing or has been sutured, or cause the infection to spread and aggravate the injury. 4, local blood circulation: local blood circulation on the one hand to ensure the oxygen and nutrition needed for tissue regeneration, on the other hand, the absorption of necrotic material and control of local infection also play an important role. Therefore, it is necessary to promote blood circulation through appropriate amount of activities after surgery. 5, blood sugar: diabetic patients, the blood contains more sugar, along with vascular lesions, will affect the wound healing. 6, smoking: the combination of carbon monoxide and hemoglobin in the blood circulation of smokers reduces the ability to transport oxygen, and nicotine will make the surrounding blood vessels contract, which will affect the wound healing. 7, psychological factors: psychological stress affects the function of the neuroendocrine immune system, slowing down the wound healing. 8, postoperative complications: thrombosis, pneumonia, peritonitis, postoperative intestinal obstruction and other complications have a direct impact on wound healing.