BACKGROUND:Because there was no thick skin for skin grafting supplied by enough area of supplying skin of patients with extensive area burn only autograft skin particle,split thickness autologous skin graft or cultural autograft can be applied in repairing wound,which cannot resolve the problems of contracture and deformity caused by scar proliferation after healing of wounds and dysfunction of joint.Acellular allodermis matrix of J 1 type is a kind of tissue with lowest antigenicity and thought as an ideal substituted material for resolving difficult problem of scar proliferation and dysfunction.