The effects of water-source conservation of soil and water conservation forests paid a good deal attention to recently. In this paper

the researches was conducted in the stands of Pinus ellfottfi

mixed stands of Alnus crenastogyne and Cupressus ~unebris

the shrub of Robfnfa pseudoacacfa

the stands of Robinnia pseudoacacia and the stands of Alnus crenastogyne

which had been established and naturally restored in late 1980s. The mechanism and the effects of water conservation were deeply studied based on the indexes of factors as following: interception of canopy

soil bulk density

soil porosity

water-holding capacity

penetrability of soil and water holding characteristics of litter. The results show that the effect of every conservation forest was significantly superior to farm land. Among the models of protective forests studied

the effects are significantly different. Some more effective models of vegetation arrangement were suggested as following: The mixed forests of Alnus crenastogyne and Cupressus~funebris

the stands of Pinus ellyottii

Alnus renastogyne etc.