Abstract: Based on the double-slotted shape, the aerodynamic shape of the bridge section is optimized to enable the long-span bridge to have the continuous bearing capacity after aerostatic buckling, and analyzed are the relationship between the aerodynamic force coefficients and the deformation after aerostatic buckling. The main research objective is to select the shape of bridge main girder section with negative slope tendency by changing the aerodynamic shape parameters such as the width of the slot and the angle of the inclined web, based on CFD numerical simulation and using the method of wind tunnel test to calculate the three-component coefficient of the cross section. Considering both nonlinearity of structure geometry and aerodynamic force, the arc length method is used to calculate the displacement of the main girder after the aerostatic instability. The results show that: the slotting width and oblique web angle can make the slope of C_L and C_M curves negative, and the negative slope effect is more obvious when the two parameters are changed together. The initial angle of attack will affect the final wind speed of instability and whether the structure has post-buckling. The slope of the three-directional force coefficient curve becomes negative reduces the increasing rate of static wind load with deformation, which can make the bridge has continued bearing capacity after static wind buckling. This increase the bridge resilience against static wind load and, improves the wind safety reserve.