Abstract: Based on "structure-action" analysis framework,dpanel data model,take Ningbo City as an example,this paper studies the homestead exit mechanism to make an empirical.The results show that:(1) from 2000 to 2015,the scale and exit potential of Ningbo homestead increased continuously,and the evolution process of exit potential was characterized by strong negative decoupling model；(2) the transfer of population and labor force and the protection of cultivated land are the main mechanisms to drive the exit of homestead.Although farmers' personal housing construction is limited,the growth of farmers' income has promoted the continuous expansion of homestead scale；(3) the lack of homestead exit mechanism is mainly manifested in the imperfection of the formal system and the inefficiency of the governance system.The research shows that:the design of land property right system in accordance with the land market mechanism,the construction of multi-agent coordinated exit mode and the guidance of spatial planning are the direction to perfect the homestead exit mechanism.

Key words: homestead exit, mechanism, "structure-action" analysis framework, exit potential, Ningbo City