The tracheotomy incision grade is a class II incision because of the possibility of contamination of the respiratory mucosa, such as secretions, so the tracheotomy wound is a potentially contaminated wound belongs to class II. In the clinical class of incision is mainly divided into three kinds: sterile wounds, may be contaminated wounds, contaminated wounds, corresponding to a class, class II, class III wounds. Class I sterile wounds: more common in body surface surgery such as breast, thyroid, inguinal hernia, scalp of the swelling. Class II potentially contaminated wounds: more common in gastrointestinal as well as liver surgeries, as gastrointestinal contents and bile may contaminate the wound and usually require prophylactic treatment with antibiotics. Category III infected wounds: common in perianal as well as perineal areas. Antibiotics should be applied promptly.