Land conversion is an inevitable phenomenon in the process of economic development . As to the economic development, land conversion is an input factor and however, in different stages of economic development, the factor has different effects on economic development . In order to explain the relationship between the spatial difference of land conversion and the stages of economic development, this paper adopts the change rate of arable land occupation and imbalance index of land conversion. Results show that the rate of farmland conversion is gradually descending, among all land categories and the change rate of arable land occupation in city construction, industry, and mining is the fastest . At the same time, the imbalance of land conversion relative to GDP and non-agricultural sectors is increasing and the imbalance relative to labor of non-agricult ural sectors is decreasing. On the whole, spatial difference of land conversion in J iangsu Province is basically in conformity with the level of economic development .