Abstract: This paper studies the effect of the gap parameters on the deformation of the thermal insulation tiles on the surface of a hypersonic flight vehicle. Different sizes of insulating tiles are laid on the floor of a planner board of 1 m². A parameterized model is established in the Python language. Simulation is performed with an approximate model of the planar array thermal insulation tiles using the ISIGHT and ABAQUS, to obtain the optimal layout scheme of the gap parameters. It is shown that the gap width has a greater effect on the contact stress than the gap spacing. The smaller the gap width, the greater the contact stress will be. To determine the gap width involves a balancing between the temperature limit of the aluminum skin and the contact stress of the tiles; while the gap spacing can be simply selected as a half of the side length of one single tile.