Soil water availability and water storage were comparatively studied for the arbor(including Prunus sibirica and Robinia pseudoacacia),shrub and farmlands.It was followed that soil water availability of different vegetation types ranged from 1.92% to 15.73%.In comparison with farmlands,soil water availability on woodlands increased by 75.31%.Total soil water storage within 40cm of the soil surface ranged from 228.30 to 251.07 t/hm².In comparison with farmlands,total soil water storage capacity on woodlands increased by about 8%.Total water storage capacity of Robinia pseudoacacia was greater than that of Prunus sibirica.This study was of significance to assess the benefits of soil improvement in the regions of converting farmlands to forest or grass lands.