Abstract: Abstract: Land resource is the unique treasures that nature presents for humanity, and it is unreplaceable resource. In order to make land to be used appropriately and efficiently, evaluating land quality, using and controlling the land resources from deterioration in different ways are the basic requirements to protect cultivated land in China. The current standards of (Environmental quality standards for soils, GB15618-1995) involve less pollutants and have a lot of boundednesses for the fact needs. Experts in China all agree that indicators for the soil environmental quality in current system need to be studied, updated and added. In this paper, the evaluation of limits of soil heavy metals that exceed standards are integrated with existing soil environmental quality assessment and food safety evaluation in different pH values of soil and different land use types. The purpose of agricultural land safety use is to minimize the potential ecological risk of farmland, and at the same time not to affect the growth of crop and the output of edible agricultural products that have no threat to human health, and to maintain the agricultural soil environmental quality. We proposed the soil heavy metal standards evaluation system in this study, which was composed of single factor index evaluation, Nemerow index evaluation, and potential ecological harm index evaluation. We summarized evaluation results of soil from 100 land use types from which the soil heavy metal elements exceeded current standards. Then we built an agricultural land safety use evaluation method through analysis and statistics of those 100 types. In this agricultural land safety use evaluation method, we not only fully expressed agricultural land safety use through terminologies, but also highlighted kinds of influence factors for crop growth and human health, and pointed out the controlling direction of land safety use in the future. Taking a county of Jiangsu Province as an example, the evaluation results of soil heavy metal concentrations that exceeded standards showed that, there were three points of Cd heavy pollution grade, one point of Hg heavy pollution grade, one point of As heavy pollution grade, one point of Pb heavy pollution grade, two points of Cu heavy pollution grade, one point of Zn heavy pollution grade, seven points of Nemerow comprehensive heavy pollution grade, and two points of high potential ecological harm in 884 soil sampling points. There were 165.90 hm2 agricultural land of Cd heavy pollution grade, 11.85 hm2 agricultural land of Hg tiny pollution grade, 11.85 hm2 agricultural land of As slight pollution grade, 11.85 hm2 agricultural land of Pb heavy pollution grade, 23.70 hm2 agricultural land of Cu heavy pollution grade, 11.85 hm2 agricultural land of Zn heavy pollution grade, 272.55 hm2 agricultural land of Nemerow comprehensive heavy pollution grade and 59.25 hm2 agricultural land of high potential ecological harm in 118,500 hm2 agricultural land. The agricultural land safety use evaluation results showed that, there were five different comprehensive safety use zones, 79.52% agricultural land of safe utilization zone (level Ⅰ), 15.38% agricultural land of main safe utilization zone (level Ⅱ), 4.33% agricultural land of low risk monitoring zone (level Ⅲ), 0.51% agricultural land of medium risk warning zone (level Ⅳ) and 0.25% agricultural land of high risk limiting zone (level Ⅴ). This agricultural land safety use evaluation method was demonstrated to be scientific and reasonable by analyzing, contrasting and summarizing the spatial distributions of five safety use zones and the existing local industrial enterprises. Different zones had different characters and needed different using methods, protection measures. The results from the methods and measures showed a need of changing land use types, making a thorough investigation of the pollution sources, controlling the pollution sources, repairing soil environment quality and so on. But the evaluation scale and the strategy of safety use in different ways still needed to be studied in the future. Therefore, it provided an important method for ensuring land resources rational utilization and protecting the cultivated lands by carrying out the regional agricultural land safety use evaluation and zoning study.