The structure of airborne TFT-LCD and the temperature characteristics of LC materials were analyzed. The phenomena and principles of macula which easily appeared in the high temperature environment of the LCD were studied. The heat conduction characteristics of the airborne TFT-LCD were analyzed. Two optimization schemes were proposed and analyzed by finite element method, after data comparison and analysis, the better one was selected for experimental verification. The experiment shows that the improved scheme could effectively optimize the heat dissipation structure and reduce the working temperature of LCD at high temperature.