Based on discussing the conception of social forestry, eco-economic characteristics of themodels of intercropping tree with grass were stated in this paper,and the significance of the modelsin aspect of solving the shortage of“three materials”in the loess hilly areas was illustrated.It wasshowed that there would be a good production prospect in intercropping tree with grass. Based onthe emphasis of production management, the models of intercropping tree with grass might be divid-ed into three types,the type of taking tree as the dominant factor,the type of taking grass as thedominant factor,and the type of balance of tree and grass.By approaching the existing problem,theauthor thinks that the further research for construction and management of the models will be nec-essary.