In order to accurately evaluate the morphology of tempered glass surface under wind-sand erosion environment, describe the evolution process of morphology, and analyze the mechanism of morphology damage. In this paper, the wind-sand erosion damage test of tempered glass was carried out. The morphology of the damaged surface was extracted by laser confocal microscope (LSCM). The transmittance of tempered glass was tested by transmittance meter. The fractal dimension, multifractal spectrum and transmittance were used to characterize the evolution process of the surface morphology of tempered glass under different evolution conditions (erosion time and erosion angle). The characteristics of erosion damage and the stage of damage were identified. It was found that under different erosion time, there were three damage stages, rapid growth period, medium growth period and stable period. The first two stages of fractal dimension growth and transmittance slow down faster.And in the latter stage, transmittance slows down and the fractal dimension will gradually stabilize at the maximum (1.875). Under different erosion angles, there were two damage stages. Under low erosion angle (≤60°), the growth rate of fractal dimension and transmittance decrease rapidly, while under high erosion angle (>60°), the growth rate of fractal dimension and transmittance decrease slowly.The erosion damage mechanism of tempered glass surface was primary damage and secondary damage. The former was caused by the single impact of aeolian sand particles, and the latter was produced by primary damage induced evolution under the continuous impact of subsequent sand grains. The complexity and weakening ability of the former to visible light were greater than those of the latter. The primary damage was dominant in the rapid growth period, medium growth period and low erosion angle (≤60°), while the secondary damage increased significantly in the stable period and high erosion angle (>60°).