Based on analyzing soil physical properties,water-holding capacity,infiltration rate and the dynamics of soil moisture of 5 main forest types in east of Heilongjiang province,the hydraulic ecologic effects have been studied comprehensivly.It was indicated that the water resource conservation function of natural forest and shrubs were better than that of the coniferous plantation and young forest.Strengthening the protection of natural forest,enhancing the structure regulation and tending management of coniferous plantation are the effective methods to improve water conservation function.