The large-span flexible photovoltaic support array is a new wind sensitive structure system， and its vertical and horizontal flow field interference is more significant than that of the single-row photovoltaic. The complexities make it difficult to accurately predict the extreme wind load of photovoltaic array. Taking a typical flexible photovoltaic demonstration project as the object， this paper analyzes the wind pressure characteristics of the single-row flexible photovoltaic surface based on the large eddy simulation method and verities the effectiveness by comparing it with the wind tunnel test. Based on the Davenport method and the Sadek-Simiu algorithm， the peak factor of non-Gaussian wind load is determined and the distribution law of the extreme wind load of photovoltaic array is revealed. Finally， the interrow interference of the array wind load is discussed systematically and the mechanism of the array wind load interference is discussed from the perspectives of spectrum analysis and flow field driving. Results show that the extreme wind load of the large-span flexible photovoltaic bracket array reaches the minimum value at the second windward row， and the interrow interference effect of the array presents a decreasing static wind load and an increasing fluctuating wind load. At 0° and 180° wind direction angles， the wind pressure interference coefficients of the flexible photovoltaic array are 1.09 and 1.14， respectively， and the bending moment interference coefficients are 1.49 and 1.21， respectively.