土壤水分特征曲线是研究土壤水运动的重要参数,寻求土壤水分特征曲线的一般规律,一直为人们所关心.在生产实际中,经常遇到土壤饱和区附近的土壤非饱和水运动,尤其是农田排水和灌溉的非饱和水运动.因而,寻求低吸力下土壤水分特征曲线的计算有重要意义,本文对此问题进行了探讨. Soil water characteristic curve is an important parameter to study soil water movement and seeking general rules of soil water characteristic curve has always been concerned.Under actual production, soil unsaturated water movement near soil saturated zone is often encountered, especially in farmland Drainage and irrigating unsaturated water movement.Therefore, it is of great significance to seek the calculation of soil water characteristic curve under low suction, and the paper discusses the problem.