Abstract: Based on Fluent 17.0 software,the numerical calculation model of heliostat group under five typical working conditions is established.Through the National Supercomputing Changsha Center,the large eddy simulation（LES） analysis of large-scale heliostat group is carried out.Under the working conditions,the distribution of the pulsating wind pressure coefficient and the pulsating wind pressure characteristics of the heliostat in the representative position of the heliostat group is discussed.The simulation results show that the wind direction has a great influence on the wind pressure distribution of the heliostat surface.The heliostat at the peripheral edge position is most affected by the pulsating wind;the pulsating wind pressure on the front and back sides of the the heliostat surface is positively correlated.Under the same wind direction,Pulsating wind pressure coefficient correlation of the heliostat at different positions is related to the inlet distance of the flow field.Pulsating wind pressure coefficient correlation of the heliostat on the windward side is small,and the correlation of the heliostats in the middle position is second.The heliostat at the outlet of the flow field is the most relevant;The pulsating wind pressure of the heliostat in front of the inflow direction is basically in accordance with the Gaussian distribution,and the pulsating wind pressure of the heliostats in other positions does not conform to the Gaussian distribution.