Abstract: To research the aerodynamic characteristics of beveled square cylinders, CFD simulations were performed on two-dimensional beveled square cylinders under wind angles of 0°-45°. The Reynolds-averaged Navier-Stokes equations and SSTk-ω turbulence model were employed to analyze the effects of beveling rate on aerodynamic force coefficients, wall pressure distribution, and wall pulsations pressure. The results indicated that beveling reduced the drag coefficient and pulsation of the square cylinder, while the reduction rate is positively correlating with the cutting angle rate, and the larger the wind direction angle is, the more obvious the effect will be. The Strouhal number increased with γ, and the influence of γ on the Strouhal number became more pronounced as α increased. For small wind angles (α ≤ 15°), beveling decreased the lift pulsation coefficient; however, for large wind angles (α>15°), beveling conversely increased the lift pulsation coefficient, with stronger pulsations observed at larger γ. Beveling had a negligible impact on windward-side pressure but significantly affected leeward and side surfaces: the leeward pressure coefficient decreased with γ, and this trend was amplified by α. The side-surface pressure coefficient showed a weak positive correlation with γ when α ≤ 30°, but a significant negative correlation when α>30°. Beveling reduced leeward pressure pulsations, with the reduction effect enhancing as γ and α increase. Small beveling rates (γ ≤ 0.15) reduced side-surface pulsations, while large beveling rates (γ>0.15) increased them—a trend that became more evident with larger α. Considering aerodynamic performance and wind pressure characteristics comprehensively, a beveling rate of γ ≤ 0.15 was recommended, with γ=0.1 identified as the optimal value.