The ultrathin light conducting film is "the new product that the emerging industry of Nanjing focuses on popularizing and applying", which has the characteristics of the ultrathin, high brightness, uniform luminescence, bendability and energy saving. The project abandoned the traditional light guide plate injection molding preparation process, carried out independent research and development, completed the light guide film point design, the preparation of precision rollers, the determination of process parameters and other key technical breakthroughs, and achieved the preparation of ultra-thin light guide film by precision conversion method.