The P-S-R model is used for building index system consist of the 25 factors, which are from three areas: the status quo of natural resources for the land, the socia-leconomica-lenvironmental pressure of the land and the human impact, are closely related to the use of land reso urces. It. s made by the principal component analysis that the quantitative researches on the land ecological security of Xi.an, To ngchuan, Baoji,Xianyang, Weinan, Yan.an,Hanzhong,Yulin,Ankang,Shangluo City etc. in Shaanxi Province. The analytic results showed that Yan. an and Yulin are good condition of the land ecological security; Hanzhong, Ankang and Shangluo are warning state of land ecological security; Tongchuan and Baoji are the medium warning state of the land ecological security; Xi.an, Xianyang and Weinan are serious warning state of the land ecological security. For the characteristics of the land ecological security status of the provincial cities,the corresponding countermeasures and suggestions are proposed.