The implication of agroforestry was expounded first in this paper,and then several models of agroforestry on the Loess Plateau were introduced along with their eco一economic benefits. Some problems about practising agroforestry on the Loess Plateau were approached last. In view of the situation of harnessing the Loess Plateau，it was considered that agroforestry is a main channel for harnessing the region and developing its economy.and should be regarded as important technical measures;the research on agroforestry is significant in theory and practice.