Oral wound protective film and preparation method thereof

The invention belongs to the field of medicines, and particularly relates to an oral wound protective film and a preparation method thereof. The oral wound protective film provided by the invention comprises a functional layer and a supporting layer compounded on one side of the functional layer, the functional layer comprises the following components: a hydrophilic polymer, a plasticizer, a thickening agent and a disintegrating agent, and the hydrophilic polymer can generate binding power during hydration; the supporting layer is made of bacterial cellulose gel. When the oral cavity wound protective film is in contact with a wet mucosa, adhesive force can be formed through rapid hydration of macromolecules of the functional layer, so that the protective film is firmly attached to the mucosa; through rapid hydration of the gel supporting layer, a tough and soft protective layer can be formed on the surface of a wound, the functional layer is protected from being damaged by a tongue, saliva or food, the protection time of the protective film is prolonged, and due to the existence of flexibility, the protective film can be simply subjected to form deformation in an oral cavity, and foreign body sensation is reduced.