Because the wound dressing protects the wound from further exogenous microorganisms and pain. Wound dressing plays a vital role in wound healing process. In the development of different wound dressings

asymmetric membranes have received extensive attention. Because it presents a layered morphology similar to the result of the epidermis and dermis of healthy skin

and it can reduce the penetration of bacteria while avoiding wound dehydration and accumulation of exudate. Among the materials used to produce asymmetric membranes

chitosan (CS) has become one of the most promising materials. It has unique characteristics such as anti-microbial

anti-inflammatory

low immunogenicity

maintenance of tissue adhesion

antioxidant properties

low toxicity

biodegradability and hemostatic properties. Therefore

this article introduced the preparation method of CS asymmetric membrane and its application in wound healing.