Abstract: To explore the blown-sand erosion resistance of carbon fiber reinforced polymer sheet, a simulation blown-sand erosion test was conducted with erosion angle and sand flow rate as variables, and the residual mechanical properties were tested. The scanning electron microscope (SEM) test results show that at a smaller erosion angle, the erosion effect is mainly horizontal cutting, while at a larger erosion angle, the erosion effect changes to vertical impact. An increase in sand flow rate significantly affects the damage morphology of the carbon fiber sheet. Wind-sand erosion damage is mainly manifested as the peeling of epoxy resin and the fracture of fiber bundles. When the sand flow rate is small, low-angle erosion causes more severe damage, with the tensile strength decreasing by approximately 14.6%. When the sand flow rate is large, the influence of high-angle erosion is greater, with the tensile strength dropping by 26.1%. Regardless of whether it is low-angle or high-angle erosion, with the continuous increase of sand flow rate, the tensile strength of the carbon fiber sheet will show a downward trend, but the erosion angle and sand flow rate have a slight effect on the elastic modulus of the carbon fiber sheet, and the amplitude of elastic modulus fluctuation is basically 5%. The increase in erosion angle and sand flow rate will cause the accumulation of damage and deformation in the erosion area, resulting in a higher strain value in this area than in the adjacent area. The strain figure distribution indicates that with the increase of sand flow rate, the stress concentration phenomenon of the material gradually becomes prominent at higher load levels. Based on the test data, a prediction model for the residual mechanical properties was proposed, which can accurately calculate the tensile strength and elastic modulus of the carbon fiber sheet and can guide the engineering practice of carbon fiber sheet in blown-sand environments.