For the problem of the optimal shelter posture of dish solar concentrator, the flow fluid model of a dish solar concentrator was established by using fluid control equations, the calculated flow velocity and pressure were then loaded into the front and back surfaces of the dish solar concentrator, and then simulation analysis of the aerodynamic characteristics and pressure distribution of dish solar concentrator was carried out. The results show that wind speed has great influence on the maximum pressure of the central area of the dish solar concentrator surface and the strength and rigidity at the center of the dish solar concentrator should be improved. Besides, the lift force, drag force, lateral force and maximum surface pressure of the dish solar concentrator increase with the increase of wind speed, especially the maximum surface pressure, while wind coefficients change little with the change of wind speed. In addition, relatively big errors exist in the calculated values of lift force coefficient, drag coefficient, lateral force coefficient and maximum surface pressure when not considering the effect of fluid-structure interaction. Moreover, the maximum surface pressure of dish solar concentrator varies intricately with change of azimuth angle, and elevation angle and it reaches to maximum when the elevation angle is 0° and the azimuth angle is 45°.