This paper analyzes the citizenization development ability of landlost farmers based on Sen’s Capability Approach.Then the Structural Equation Modeling (SEM) containing the landlost farmers’ measurement system of multidimensional capability and influencing factors is constructed.On this basis,this paper makes an empirical study on the sampling data of 482 landlost farmers in South Jiangsu province.The result shows that citizenization of landlost farmers is at a lower level,among which the lack of economic capability and development capability is particularly prominent.Moreover,it is found that factors such as the individual human capital,land requisition compensation,community support and public service have a significant positive effect on landlost farmers’ citizenization ability while human capital variable plays a partial mediating effect.