Due to the different thermal expansion coefficients,elastic modulus,and Poisson ratio of the optical cement adhesive,rugged glass,and polarizer,some thermal stress will perform on a rugged LCD when the ambient temperature changes. The paper establishes the finite element analysis model of the rugged LCD in the high ambient temperature to simulate the possible thermal stresses with different adhesive thickness,different ruggedization processes,and different rugged glass thickness. The simulation results show that:When the rugged glass thickness is 2.3 mm,the adhesive thickness is 300 μm,and the elastic modulus,thermal expansion coefficient,Poisson ratio of the adhesive is respectively 1.65E7 Pa,1.2E-3/℃,and 0.44,the displacement,the strain,the stress of the rugged LCD is the least,which helps guarantee the display performance.