Based on provincial panel data and time series data from 2001 to 2011,this paper analyzes the Kuznets curve effect and its inflection point distribution between economic growth and land illegality from both the national level and provincial level.The result shows that there is a significant feature of Kuznets curve between China's economic growth and land illegality.However,from the provincial level,except that three provinces like Jiangsu,Henan,Xinjiang showed a significant positive correlation,the other provinces have not yet proposed synthetic Kuznets curve,which indicates that government intervention can change the Kuznets curve inflection point value.,for example,the cost of land illegality could be increased,land illegality illegal land areas involved could be reduced,and the impact of land illegality on economic growth could also be reduced through government intervention.To avoid the principal-agent problems,reform of land inspectors should focus on the promotion of land inspector legislation,improvement of land inspectors linkage mechanism,and the formation of incentive and restraint mechanisms among land inspection staffs.