In order to investigate the influence of lay-up area variables on the static aeroelasticity of a high span ratio wing， this paper uses finite element analysis to investigate the influence of the division of the outer wing section lay-up area and the number of 90° lay-up angles on the static aeroelasticity of a high span ratio wing， while accounting for geometrical non-linearity. The results show that the effect of 0°， ±45°， and 90° mixed lay-ups is superior to that of 0° and ±45° lay-ups alone； the wing deformation decreases with the increase of the outer section lay-up area， and the slope of the decrease gradually increases；when the outer section lay-up area is fixed， increasing the number of 90° lay-up angles effectively reduces the wing deformation， and the wing deformation essentially shows a negative correlation with the number of plies， there may exist an optimal value or optimal ratio in the ply design.