Based on the literature review of evaluation methods of regional land ecological security,Yongzhou city,in red soil hilly region in south Hunan,is chosen as a region to study the land ecological security situation.From the aspects of nature,e-conomy and society,18 indexes which have significant impact on the ecological security in the region according to PSR model are selected.The land ecological security of Yongzhou city from 2003 to 2012 was also evaluated by using the entropy method and index additive model.The result indicated that land eco...