Based on the Reynolds averaged N-S equation closed by the Spalart-Allmaras turbulence model(S-A model), the third-order Runge-Kutta method along the uniform streamline and Galerkin method are used for the temporal and spatial discretization respectively, and the finite element discretization scheme of the turbulence equation is obtained. Based on the self-compiled MATLAB program, the flow past an iced conductor under different wind attack angles is numerically simulated. The transient and time averaged flow fields, the time history curves of aerodynamic coefficient and the average aerodynamic coefficients variation with wind attack angle are obtained. The comparison with the experimental results shows the effectiveness of the proposed finite element algorithm. Based on the analysis of flow field evolution and average pressure distribution, it can be found that the transfer of boundary layer separation point caused by the change of wind attack angle is the main reason for the sharp jump of lift coefficient.