[ Objective] The research aimed to study the characteristics of grain size of wind erosion in Hebei Bashang Kangbao County farm*rnland in the vertical height and the level of the distance, [Method] In Kangbao County, field observation was conducted to determine the sizernof farmland wind erosion with Malvern laser particle size analyzer, [Method] The sand flow wind erosion content with > 0.01 mm size wasrngiven priority to, and the content were more than 80%. All kinds of cultivated land were concentrated in wind erosion particle size of 0, 05 -rn0. 25 mm, and wind erosion was relatively serious in the range of particle size. In vertical height, the average particle size of the wind erosionrndeclined exponentially. [ Conclusion] The research could provide the basis for the selection of the windbreak method and the prevention of thernwind erosion in the farm.%[目的]了解河北坝上康保县农田风沙流中风蚀物的粒度在垂直高度和水平距离上的变化规律.[方法]在康保县选择农田进行野外观测,再对农田风蚀物用马尔文激光粒度仪进行粒度测定.[结果]风沙流中的风蚀物以＞0.01 mm粒径为主,含量均在80％以上.各类耕地风蚀物粒径均集中在0.05～0.25 mm,且在这一粒径范围内风蚀较为严重.在垂直高度上,风蚀物的平均粒径随着垂直高度的增加呈指数递减.[结论]该研究可以为采取防风措施、防治农田风蚀提供依据.
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