The present invention discloses a method for treating wounds and for accelerating the healing of wounds by administering an effective amount of a pharmaceutical composition containing type VII collagen protein, mini-C7 protein, variants thereof or any combinations thereof. The pharmaceutical composition may be administered through a variety of routes including intravenous injection, topical application, or oral ingestion. The method may further include administering a genetically modified fibroblast capable of expressing type VII collagen protein, mini-C7 protein, variants thereof or small growth factors to achieve synergistic healing effect.