Abstract: The structure，function，and economic benefit of the model of“combining-four factors in one system”with high efficiency facility agriculture in Loess Plateau were investigated and analyzed．The results show that farmers must have a certain amount of lives tock in a criticaIlevel and scale in order to carry it effectively．A suitable model of the “combiningfour factors in one system”with high efficiency facility agriculture must be given according to the local agriculture conditions and the characteristics of farlners family，and the construction countermeasures must be given at the same time．