The items that need to be prepared for debridement are sterile gauze, soapy water, brush, hydrogen peroxide, saline, curved disk, scissors, and the doctor needs to wear a mask, hat and wash his hands, and wear disposable gloves after washing his hands. Fully expose the patient’s wound, use sterile gauze to cover the wound, use soap and water and brush to clean the dirt on the skin outside the wound, clean around the wound after removing the foreign body in the wound, then use hydrogen peroxide to clean the wound, then use saline to rinse, hydrogen peroxide and saline alternately repeated rinsing for many times, after rinsing, use scissors to cut off the necrotic tissue in the wound, as well as removing blood clots in the wound, and use iodine vodine to disinfect it again. After disinfection, the wound can be sutured.