In order to investigate the distribution law of wind-induced acceleration response at various heights of the trunk，different time distances and different wind speeds，field measurements were made on the front wind field and trunk acceleration response of a single willow tree. The results show that there are significant differences between the probability distribution characteristics of wind-induced tree trunk acceleration response and wind-downwind pulsating wind speed. The wind-downwind pulsating wind speed approximates the Gaussian distribution，and the probability distribution of wind-downwind acceleration response of tree trunk is a sharp non-Gaussian probability distribution. The wind-induced response of willow is a process of forced vibration. The generalized Pareto extremum algorithm was used to calculate the extremum acceleration response. When the distance was 180 s，the correlation between the mean wind speed in front of the tree and the extremum acceleration response in the downwind direction was the highest. The response of extreme acceleration at different height of the trunk under different mean wind speed in the front of the tree was analyzed and predicted by fitting. It was found that the downwind extreme acceleration of the trunk had a quadratic nonlinear relationship with the mean wind speed in the front of the tree. The study of wind-induced response characteristics of willow is of great significance to the study of wind resistance of tress.