Jianghan plain is the important production base of grain,cotton and oil and also the typical region of rapid expansion of urbanization in China.Study on ecological security condition of cultivated land resources and spatial agglomeration pattern in Jianghan plain will give the reference to the guarantee of regional grain security and promotion of reasonable use of land resources.Based on the “hidden dangers-state-immune” model and basic theory of ecology,ecological security evaluation index system of cultivated land resources,this paper analyzes the characteristics and spatial agglomeration with different time and space of ecological security of cultivated land resources in Jianghan plain by using modified permutations polygon comprehensive graphic method and spatial autocorrelation method.The result shows that the overall level of ecological security of cultivated land resources in Jianghan plain is very low and its security composite index is only 0.228,which shows that it is in the unsafe condition.The composite index showed a trend of fluctuations over the years and ecological system of cultivated land is in the unstable state.Spatial agglomeration in all cities and counties of Jianghan plain is not significant,the ecological security of cultivated land has come to a tendency of changing from agglomeration to discretization and a relatively stable space structure is still not formed.This paper finally points out that huge loss of cultivated land resources caused by rapid expansion of urbanization is the main reason for the low level of ecological security of cultivated land in Jianghan plain.