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Chitosan nanofibers are widely used in the field of wound dressings due to their excellent biocompatibility, antibacterial activity, and healing ability. One of the research directions in this field is to composite and modificate chitosan with other medical materials to prepare nanofiber composite materials and to study their properties. In this paper, the characteristics of chitosan nanofibers as wound dressings and the newly developed chitosan nanofiber composite materials are introduced.Scar is a kind of skin fibroproliferative disease