Abstract: 【Objective】 Study on the Characteristics of Wind Propagation and Dispersal of Achnatherum inebrians seeds. 【Method】 Taking the poisonous grassland grass Achnatherum inebrians as the research material, the vertical settling time of seeds in still air and the horizontal moving distance under different wind speeds were measured, and the correlation between settling time and moving distance was analyzed; The seed dispersal distance under natural wind was measured and the seed dispersal distance model was established to explore the effect of wind on seed dispersal of Achnatherum inebrians. 【Result】 The settling velocity of the awned seeds of Achnatherum inebrians was significantly lower than that of the no-awned seeds; The horizontal moving distance of seeds increased with the increase of wind speed, and the awned had no effect on the horizontal moving distance.Under the action of natural wind, the dispersal distance of high, middle and low plants was 0-220 cm, and the secondary dispersal distance of seeds was 0-18 cm.Among the three plants, the fitting effects of middle and high plants were the best.The model was: Y_middle = 0.002,88+0.006,5X-0.000,042,46X²+0.000,000,062,284X³. 【Conclusion】 The awned and high winds speeds promote the wind dispersal of Achnatherum inebrians seeds.Achnatherum inebrians seeds belong to short-distance dispersal in wind dispersal.