Abstract: Aiming at solving the problem that surface of optical plastic is easy to be scratched, will have film crack at high temperature, Ti₃O₅ and SiO₂ are selected as high and low refractive index coating material because of its stable mechanical properties in room temperature in this paper. According to theory of thin film, TFCalc software are used to achieve film system design, and electron beam evaporation and ion beam assist deposition are used to deposit coating material Finally, new anti-water fluorine material are deposited by resistance depositing.Through selecting new material SV-55 as connecting layer, adhesion of plastic lens and film is enhanced and problem of SiO₂ and plastic lens expansion coefficient mismatch is solved, which improves ability of temperature resistance of plastic lenses. Through continuous optimization of experimental parameters, reflectivity of green antireflection film is less than or equal to 1% at 400 nm~700 nm. Results show that, plastic lenses have the ability to resist friction, aging and hydrophobicity, and can be widely used.