The objective of small watershed comprehensive harness in gullied region of loess plateau is to form a efficient agricultural eco-economic system.After the small watershed comprehensive harnessing at Wangdong gully for 10 years, an obvious benefit has been achieved as follows:1.the agricultural structure has been changed remarkably;2.the land resources has been unitilized efficiently;3.the road net for erosion controlling of gully slope at small watershed has been built;4.the average productivity of grain is 3750kg/hm²;5.the net income per capita from 230 Yuan to 1313 Yuan;6.the sediment discharge reduces from 1860t/(km².a)to 800/(km².a);7.the ratio of forested area rises from 18%to 39.5%.The key to comprehensive harnessing is to use land resources efficiently and in all-round way, it includes to raise laud productive force, to retain the runoff from village road and stiff ground in plateau region;to develop economic fruit belt and set up erosion controlling techniques systom in gully slope;to construct forest belt of soil and water conservation in the valley.Finally, the benefits of society, economy and ecology are achieved at the same time