Objective      To evaluate the clinical efficiency of absorbable biological dressing in repairing the knee wounds caused by exceptionally large area burns.       Methods      Eight patients (aged from 23 to 45) suffering from exceptionally large area burns admitted in our department from January 2010 to September 2014 were recruited in this study. They were all with deep burns covering more than 90% total body surface area (TBSA)

and few of them had healthy skin source for grafting. After their conditions were stable

escharectomy was operated on the knee wounds. Then the absorbable biological dressing was grafted on the operation wounds. If there was unclean granulation tissue growing on the wound surface

it would be shaved and then covered with the absorbable biological dressing. In 2 or 3 weeks later

the silicone membrane of the absorbable biological dressing needed to be removed and the splitthickness scalp was grafted on the surface.       Results      Seven wounds were successfully repaired

and the other wound got serious infection

which leaded part of the absorbable biological dressing to shedding. The wound was healed after several dressing and splitthickness scalp grafting. During the followup of 3 months to 2 years

the skin grafting area got good appearance

sound elasticity

and satisfactory antifriction capability

but had no obvious scar formation. The knee joint was flexible with no restriction.       Conclusion      Repairing of deep burned knee wounds with the absorbable biological dressing and splitthickness scalp grafting can achieve good appearance and function in the skin grafting area. This method is worth of wide application.