Abstract:This paper presents studied the water—physical and chemical charater and the soil nutrient of forest soil in loess region. The results obtained are summarized as follows:The water—physical charater of follen leaves and humus horizon of forest soil are; volume weight lower, noncapillary porosity development, capillary porosity nondevelopment and content of saturaed water higher, these charater all advantaged admit precipitation, conservative water and soil and avoid flow-off.The chemical charater of forest soil are: lower pH, content of calcium carbonate reduced in follen leaves and humus horizon; organic matter, total nitrogen and total phosphate in accordance with index equation(Y=AeB/X) in distrebution of porofile. But total potassium accordance with index equation (Y=Ae-B/X).The available nitrogen, phosphate and potassium of lower with increase of depth.