Land ecological safe or not has become an important factor that affect human the survival and development,Attention and efforts to resolve the issue of land ecological security is the necessary means to achieve regional sustainable development. In this paper, Hengyang is to be an example,and based on Hengyang City Statistical Yearbook,a land ecological on Safety Evaluation System of Hengyang City is built with using SPSS principal component analysis and Selecting eight representative evaluation factor.The results shows that the industrial structure is a key factor affecting the ecological secu...
