The invention discloses a medical absorbable burn and scald repair film and a preparation method thereof. The preparation method comprises the steps of material selection, heteropolymeric protein removal, virus inactivation, collagen degreasing, casing extension, chitosan atomization, dressing shaping, dressing solidification, cutting and inspection, packaging, sterilization and the like. Chitosanhas antibacterial activity, can resist microbial infection, induce tissue regeneration and accelerate wound healing, and does not cause any inflammatory reaction in tissue. Collagen has hemostatic and repairing functions, has bioabsorbability and cell adhesion, and can promote new cell formation and epithelial cell formation. The medical absorbable burn and scald repair film is low in antigenicity, and good in human tissue compatibility, is stable in absorption period through automatic coordination and absorption of enzymes and body fluid, and finally, is absorbed by a human body completely.The burn and scald repair film prepared by the method has the characteristics of uniform texture, good elasticity, high transparency, good air permeability, good biocompatibility, capability of beingabsorbed by organisms, small toxic and side effects and the like.