How to treat small deep wounds is a relatively difficult problem, if implantation, generally costly, and to tear down the east wall to mend the west wall, the patient and family is not far to accept, but not implantation traditional drug replacement, time-consuming and long, and the wound in a certain period of time can not touch water, poor quality of life, but also frequent trips to the hospital. The author applied microdynamic negative pressure to heal dozens of cases of deep wounds, including deep II degree burns, III degree burns, external wound granulation wounds, radioactive ulcers, etc., with good results. It shortens the healing time and improves the quality of life (you can take a bath and don’t need to run to the hospital frequently). The following are typical cases. 1. low heat (hot water bag contact) scald, deep trauma, refused to implant skin. 2. hot water scald, pre-treatment improper infection deepened trauma, unwilling to implant skin. 3. hot water scald, 2 weeks trauma infection in the old home native method of treatment, family members refused to implant skin, by traditional drug exchange, control infection, local healing after the application of negative pressure.