Abstract: Accurate identification of the response of cultivated land productivity under different cultivated land intensive use level is an important prerequisite for guiding the input of cultivated land use and ensuring national food security. Based on the land law of diminishing, the relationship between land utilization level and the productivity of cultivated land were analyzed together with an empirical research on the urban scale for Hubei province by using the national standard of secondary indicators and constructing the Kuznets curve model of land intensive use and cultivated land productivity. The results showed that Kuznets curve model can effectively identify the response rules of different cultivated land utilization level and land productivity, and the cultivated land intensive use level and productivity of EYuWan hills and mountains, the plains along the river and the zone of Qinba mountains around the basin exists Kuznets inverted U curve. From the comparison between the corresponding critical value and the input level of cultivated land use, we can conclude that, for Xiangyang cities, it is necessary to enhanve structure effective in the cultivated land intensive use; while for Suizhou cities, it is necessary to strengthen the cultivated land use input structure, in order to improve the structure effective in the cultivated land intensive use. This study is expected to provide decisionmaking basis for optimizing the structure of cultivated land use input and making different policy in land use and land protection. Key words：cultivated land; intensive use; actual production capacity of cultivated land; Kuznets curve; Hubei province