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In this study, the geographic information system (Geographical Information System, GIS) as the main technical means, respectively, to establish the regional topography, climate, soil spatial database, multi-standard evaluation (Multi-Criteria Evaluation, MCE) method based on analysis of the Chinese The distribution of the wheat growing areas potentially suitable space and its future trends. The conclusions obtained are as follows: 1) of spring wheat in China potentially suitable planting areas from northeast to southwest zonal distribution, little distribution in Xinjiang and other regions, including Jilin Province in central and southwest, Heilongjiang Province, the southern and eastern Inner Mongolia, in some areas is the most suitable for planting spring wheat region; winter wheat in China potentially suitable planting areas mainly in Hebei Province, Shandong Province, Jiangsu Province, Shanxi Province, Gansu Province, Sichuan Province, Yunnan Province and Tibet and other provinces, including Shandong, Henan some areas of the Province, Shaanxi Province, Sichuan, Yunnan, Tibet and other provinces of the areas most suitable for the growth of wheat. The study results are basically in line with the actual major wheat growing areas of distribution. 2) under future climate conditions, spring wheat potentially suitable planting areas to move northwest, the total potential suitable acreage increased from 1,452,108 km2 to 1,010,867 km2, a decrease of 30.4%; suitable planting area of ??winter wheat potential in the future climate under the conditions of moving north from potentially suitable for planting area 2,092,551 km2 to 2,324,458 km2, an increase of 11.1%. 3) wheat due to climate change and potential changes in suitable growing areas, a considerable part of the current forest-steppe ecotone. Under future climate conditions the spring wheat potentially suitable growing areas showed an increasing trend in the proportion of the region, from 30.24% to 33%. Under future climate conditions, winter wheat potentially suitable growing areas showed an increasing trend in the proportion of the region, from 1.7% to 14.59%. 4) the results of this study is to establish the spatial database and research is an important part of the decision-making system \Related sites have been established, the the website http://www.cropmap.net/ and http://www.chinaeam.net/. The system to fill the vacancy of the crops Online system through the network and the user interaction, to provide users with the provinces and even the county and township crop layout of visual information, to provide decision-making reference for agricultural development and ecological management, at the same time based on user feedback views continue to update and expand the database.
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