[Objective] This paper aims to provide scientific support for land resource management and its sustainable use in Zhangjiakou City of Hebei Province through studying the evolution of land ecological security and its spatial variation.[Methods] This paper developed an index system for the evaluation of land ecological security according to land natural attributes, land use condition, land pollution and degradation, landscape pattern, land ecological construction and land social-economic condition. The paper also evaluated the land ecological security condition in 2000 and 2010 of Zhangjiakou City using the comprehensive index method, and analyzed the changes of land ecological security and its spatial heterogeneity.[Results] The land ecological security value in most counties of Zhangjiakou City increased from 2000 to 2010, and the land ecological security in most counties were in secure situation, less secure situation, and sensitive situation. The counties with land ecological security condition in risk and deteriorating situation mainly located in Zhangjiakou urban center and its surrounding areas.[Conclusion] The land ecological security situation in Zhangjiakou City has become better in the past 10 years, which may be attributed to the "grain for green project" and other ecological restoration projects.