The invention relates to a method for fitting infrasonic station wind noise-wind speed data, and on the basis of monitoring data of an international monitoring system infrasonic station affected by typhoon, a method for segmentation fitting of infrasonic wind noise-wind speed data is provided. A fifth-order polynomial is employed for fitting in a segmented interval, the infrasonic wind noise-wind speed data can correspond with actually measured data well, a method that a modeling data wind speed interval is larger than a model data interval is employed, and a relatively-large model error caused by end-point data influence is effectively avoided. The problem that under the condition of the low wind speed and the high wind speed, the increase rate of the amplitude of wind noise along with the wind speed is different is effectively solved.