Based on an analysis of the history and present status of the farmland-pastoral ecotone in the northern part of China, a new point of view was proposed in this paper for the construction  of eco-environmental systems, namely, the industrial structure has to be modified so as to make  a functional integration between different parts of the whole system: ①To give priority to a combination between cultivated grassland and in-shed feeding of domestic animals, and at the same time, to employ a new model of animal husbandry so that the degradated natural grassland can be recovered; ②To develop a new type of processing industry for agricultural and forestal products so as to  create a pluralistic enterprise structure; ③ To make a better use of water resources by taking advantages of the abundant resources of energy and minerals, and to restrain the expansion of industries of high environmental cost; ④To employ techniques of integration management and restoration ecology, and to speed up the process of woodland and grassland recovery; ⑤To make a thorough plan for arrangements of hills, waters, roads, farmlands, forests and pastures in order to gain an integration at landscape level.