Abstract: In this paper,the numerical investigation of the single heliostat is conducted by Fluent 17.0 software,and the simulation results obtained from this are compared with the wind tunnel test data to verify the reliability of the simulation method. Then-based on the national supercomputing Changsha Center,the numerical simulation model of the heliostat group is established. Via supercomputing technology,the large eddy simulation（LES）is used to simulate the working conditions of the heliostat group with an elevation angle of45°,and the mean wind pressure coefficients of the group heliostats in the atmospheric boundary layer under different wind direction conditions are obtained. The study showed that the change of flow field direction has a great influence on the wind pressure distribution of heliostat group. The 45° and 135° wind direction angles are the most unfavorable flow field azimuth. The surrounding edge position of the heliostat group is the most unfavorable force position. This research can provide theoretical basis for the actual design of thermal power station.