Abstract: This paper,applying the principle of water balance and soil water dynamics, studies the water efficiency of agroforestry such as,that of tree herbage+husbandry pattern, shelternet-paulownia+crop intercropping pattern and shelternet-pear+crop intercropping pattern. The results show that: (1)In the tree-herbage+husbandry pattern,the tree could intercept the precipitation,but the interception amount is less than 10% of the whole year′s precipitation, so the interception could not bring promising effect to the herbage under the trees. (2)The shelternet-paulownia+ crop intercropping pattern could reduce 12.0% of field evapo transpiration. (3)In the shelternet-pear+crop intercropping pattern,the soil water content at 0～40 cm depth is about 14.0% more than that of the control spot,which is helpful to wheat′s filling.