[Objective] The key factors affecting the change of land ecological security status were further identified in order to provide the basis for optimizing land use pattern and implementing the construction of ecological civilization in Guangxi Zhuang Autonomous Region.[Methods] Based on the PSR model combined with the NES(nature-economy-society) and PRED(population-economy-environment-development) framework, a four-level evaluation system was constructed, including the target layer, criterion layer and index layer, factors level. The catastrophe progression method(CPM) was applied to reveal the land ecological security overall trend in Guangxi Autonomous Region from 2005 to 2015, and through calculating the grey correlation degree, we can identify the influence factors of different stages.[Results] The results show a rapid upward trend of the land ecological security level in Guangxi area from 2005 to 2009 and reached at a relatively safe state, which was mainly attributed to the positive effect of the improvement of land ecosystem situation. From 2010 to 2015, the level of the land ecological security first increased steadily and then dropped to a critical state. Although the significant increase of ecosystem pressure caused a decline of the land ecological security, the increase of ecosystem response year by year brought positive effects. The results of grey correlation analysis show that the changes from 2005 to 2009 were mainly attributed to the afforestation project and ecosystem improvement. And the changes from 2010 to 2012 were mainly due to social and economic advancement and social development. From 2013 to 2015, the changes were mainly due to population growth and the response of human activities to the natural environment.[Conclusion] In view of the main limiting factors affecting the level of land ecological security, Guangxi area should pay more attention to the transformation of economic growth mode, improving resource utilization efficiency, control ling industrial pollution emissions and enhancing the level of agricultural science and technology and so on.