Debridement is the removal of foreign bodies, necrotic and infected tissues from an open wound to make it clean. The basic principle of debridement is asepsis, which must be strictly observed during the surgical operation to help the wound recover. The cleaning of the wound is also one of the important steps. A large amount of saline or hydrogen peroxide should be used to rinse and repeatedly rinse the wound to make it clean before performing the debridement. Pay attention to the protection of normal tissues during debridement, and remove as much necrotic tissue as possible to effectively promote wound healing. After debridement, stop the bleeding thoroughly and rinse the wound with saline again. The surgical pad sheet and the operator’s sterile gloves should be changed during suturing to avoid excessive tension leading to ischemia or necrosis, and the suture should be covered with sterile gauze for fixation afterwards.