Composition of oral soluble film and application thereof

An oral soluble film comprising:

• a composition comprising a film-forming agent, a plasticizing agent, and a target releasing substance,
• wherein the film-forming agent comprises pectin and polysaccharide backbones.

A method for preparing an oral soluble film, the method comprising:

• mixing a film-forming agent, a plasticizing agent, and a target releasing substance with water to form a mixture, and stirring the mixture, wherein the film-forming agent comprises pectin and polysaccharide backbones;
• and
• subjecting the mixture to coating, heating and cutting to obtain the oral soluble film.