Abstract: This study investigates the probability density distribution and non-Gaussian characteristics of fluctuating wind pressure on a rectangular section with an aspect ratio of 4. Rigid model pressure measurement wind tunnel tests were conducted to analyze the regions of Gaussian and non-Gaussian characteristics. The modified Hermite method was then used to calculate the peak factor and extreme values of the non-Gaussian region. Results indicate that pressure taps on the crosswind and leeward sides of the rectangular section fall entirely within the non-Gaussian region, displaying significant deviations and bulges in the probability density distribution. Furthermore, both the peak factor suggested by the code and the peak factor based on Gaussian processes are significantly lower than the peak factor determined through the improved Hermite method, which is recommended to be used for calculating the fluctuating wind pressure extremes in the non-Gaussian region.