Based on the analysis on the conditions of land resources, the changing trend in the requirements of land for various purposes, the structure of land use and the manner of land use is discussed in this paper. The changes in land use are determined by both social economic development and conditions of land and water resources. In this paper, the impacts of the changes in land use on environment and sustainable agricultural development are also discussed. Policies and measures which can help to achieve the purpose of using land resources effectively are proposed.