Aiming at the LCDs’ abnormal display under electromagnetic interference, a comprehensive method is proposed to improve LCDs electromagnetic immunity and display under complex electromagnetic environment based on the signal transmission integrity theory. Firstly, the abnormal display mechanism under electromagnetic interference is analyzed based on signal integrity. Secondly, the scheme of improving LCDs electromagnetic immunity performance is summarized based on the three aspects of adaptive signal quality enhancement model, signal transmission path optimization and LCDs composite absorbing material. Finally, electromagnetic simulation and product testing results demonstrate that the above proposed scheme can effectively improve LCDs anti-electromagnetic interference and electromagnetic compatibility performance.