The continuous investigation and experiment on different vegetation in the loess hilly and gully region in past 10 years were conducted. The results indicate that soil moisture content varieties among the artificial grass, the seabuckthorn and the Chinese pine woodland are basic consistence in the long series years, the water resources were 100-140 mm in 1 m soil layer, and the soil was in "dry horizon" stage during growth period. Soil water content in natural grass land was about 40mm higher than artificial grass land in a year, the soil humidity was always in proper and stable level. The woodlands, seabnckthorn and Chinese pine, express the growth condition that are adapte to the weather character. But from the point of hydrological circulation condition, the long time "dry horizon" stage of soil humidity was disadvantage for vegetation growth and ecosystem development. The runoff experiments indicate that the average runoff of artificial grass land and Chinese pine woodland was 1. 45 mm and 1. 27 mm, the runoff coefficient was 0.08 and 0.07; The natural pasture and the seabuckthorn woodland did not produce big runoff during a year. The runoff was also small, and lots of them were clear fluid. Therefore, the managing measures of vegetation instauration should appropriate to its natural restoration and protection, and make greatly use of the runoff resources to add soil humidity, and to develope toward the benefical vegetation growth direction.