The internal components of flexible OLED module will be damaged due to impact and other factors while used. Modifying the structure of the module and testing the performance through mechanical test are the effective way to improve the impact resistance strength of the module. In this paper, the finite element simulation method is used to establish a finite element model of pencil-impacted test. The model is used to analyze how the single or double cover window, the different thickness and modulus of cover window, the different thickness and modulus of OCA layers and whether add a SUS layer under the bottom will influence the maximum strain of TFE layer which is easily damaged in OLED panel. The simulation results show that using the double cover window structure, increasing the thickness and modulus of the upper cover window and OCA layer, and adding a steel SUS layer under the bottom plate can reduce the maximum strain of the TFE layer, which is beneficial to improving the impact resistance strength of the module, and some results are verified by the test. The simulation results provide guidance for optimizing structural design and improving the impact resistance strength of existing structures.