A new design method of flexible display film was proposed. Because of the use of light-emitting diodes (LED) chips to make display screens, it can improve the shortcomings of conventional display screens, such as seamless splicing, low refresh frequency and relatively narrow application.If the substrate material of the display film is polycarbonate (PI) film, the printed circuit board (PCB) behind the film is also flexible, so the display screen can be flexible and can be applied to more occasions. One of the core designs of the display screen is the design of the display film. In the designed and manufactured flexible display film, the pixel spacing is 1 mm and the bending radius is less than 10 cm, We need to set up isolation layer and phosphor layer, that is on the top and the other side. Finally, the simulation analysis was carried out by using the professional software of lighttools, and a series of specific simulation analysis and experiments were carried out, the bending radius of the sample with 1 mm pixel spacing is 3.1 cm. It can be seen thatthe experimental results are in good agreement with the simulation analysis, proving the design is feasible.