In the liquid crystal television display module, the multilayer backlight diaphragm and pixel panel both have periodic structures, and their use in combinations often results in obvious moire fringes, which seriously affects the actual visual effect. Therefore, it is important to establish a theoretical model of moire fringes in the liquid crystal display (LCD) module and carry out simulation analysis to explore methods for decreasing or eliminating moire fringes. Here, a moire fringe model with bilayer prismatic diaphragm based on Zemax is established, and it is combined with an eye observation model to simulate the visual effect of human eyes on the moire fringes in the LCD screen. In addition, the theoretical models of the backlight diaphragm and pixel panel are constructed in MATLAB. By changing parameters including the cycle size and rotation angle of the backlight diaphragm and the pixel panel, the parameters including the size and angle of the moire fringe are simulated and analyzed, and the effect of moire fringes determined by the human eye observation on the display is considered comprehensively.