With the fast development of economy and urbanization, the phenomenon of city construction occupying Cropland often happens. As the contradiction between human and land becomes more prominent, the contradiction between the supply and demand of the cropland are more radical in Yantai City of China. Analysis on the balance between supply and demand of cropland is the main basis to determine land use objectives, and also the basis of editing land use planning. In this paper, the authors firstly

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... culated the potential of cropland supply in Yantai for 2020 according to its current number of the cropland and the potential quantity of other kinds of land changing to the cropland, and then calculated the demand for cropland in 2020 with the methods of the population prediction and its national economic development planning. Then the balance between the supply and demand of cropland was analyzed. The results were that the cropland in Yantai city in 2020 were lower than those of its demand. At last, to relieve the contradiction, the authors tried to put forward some recommendations like optimizing the structure to coordinate the balance between the supply and demand of the cropland etc. to realize its regional sustainable development. Key word: Land; balance between land supply and demand; Analysis; 2020; Yantai 1.Introduction Land is the source of all existence and production, which is also the mother of wealth. In recent decades, with the rapid development of the city urbanization, population increasing and economy growing , the demand for construction land is increasing, which causes its expanding and leads to its occupation of the crop land from time to time. Crop land is not only the base of agriculture which is the root of human survival, but also an important indicator of the adjustment in the overall land using planning. While the determination of the arable planning indicators relies much on the accurate prediction and reasonable analysis of supply and demand of the crop land. So the analysis of supply and demand of the crop land can not only provide the basis for the overall land use planning, but also coordinate the contradiction of different land use [1] . Therefore, the study of the balance between supply and demand of crop land is of significance to optimize land use structure, to coordinate the land Downloaded From: http://proceedings.spiedigitallibrary.org/ on 08/06/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Proc. of SPIE Vol. 9221 922114-2 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 08/06/2015 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx