Abstract: In order to improve utilization of land resources in Xinzheng City, the paper used gradual reduction model of the mechanism method to quantitatively estimate the production potential of land resources of Xinzheng City and to modify climate productive potential with the PI index of land productivity index model for soil correction coefficient, and used production potential index to evaluate arable land productivity level. The results showed that, soil correction coefficient of all towns in Xinzheng City reached an average of 0.54, arable land potential productivity reached an average of 19393.84 kg/hm², and production potential indexes reached an average of 47.39%, so there is still considerable land production potential to be exploited.