The invention discloses an optical film. The optical film comprises a polymer material body, wherein at least one surface of the polymer material body is provided with a composite film layer. The structure and composition of the optical film are optimized, so that the optical film has high forming processing performance and meets various forming processing requirements; the optical film has high surface hardness, wear resistance and scratch resistance, the surface of the optical film can be prevented from being scratched or damaged, and the surface hardness, scratch resistance and wear resistance of the optical film can be further improved by adding a coating structure; the optical film has high weather resistance and chemical resistance and meets various application requirements; and in addition, the optical film has high heat resistance and dimensional stability.