Fishbone chart is used to analyze the status of the living ability of land-losing farmers, as well as its causation from the aspects of system layer, social support network, land-losing farmer themselves, and economic layer. Result shows that the system layer includes the unreasonable land compensation, the lack of social security for land-losing farmers, and the employment exclusion of land-losing farmers. Small scale and low heterogeneity are the causations for social support network. Low willingness to become citizens, low cultural quality and difficulty in role change are the causations of land-losing farmers themselves. The low expected return and high living cost are the causations for economic layer. Based on the above analysis, countermeasures to improve the urban-living ability of land-losing farmers are put forward, such as improving the land expropriation system, establishing a multi-level social security system, enhancing the training and employment mechanism of land-losing farmers, and improving the quality of land-losing farmers.