以西安市1998-2013年统计年鉴数据为基础，构建土地利用与生态环境评价指标体系，并应用主成分分析法确定权重，依据协调度模型定量评价二者关系，最后运用GM（1，1）模型预测未来趋势，以期为二者关系协调发展提供决策依据。结果表明：（1）二者间存在复杂时变非线性的动态耦合关系，即1997-2005年为发展初期，土地利用类型为勉强协调类土地利用滞后型，关系并不稳定且协调水平低；2006-2011年为发展中期，类型转换为初级、中级协调类土地利用滞后型，关系开始趋于稳定；自2012年后基本稳定在良好协调类生态环境滞后型，呈V型轨迹并向有序、稳定的协调关系发展。（2）1997-2012年二者评价指数均呈上升趋势，影响协调发展度的主要因素从生态环境逐渐演变为土地利用。因此，平衡二者发展速度，调控土地利用方式，对协调发展关系至关重要。

An evaluation index system of land use and ecological environment was constructed on the basis of Xi'an statistical yearbook data from 1998 to 2013 in this study. The relative importance was confirmed with principal component analysis and the relationship between land use and ecological environment was evaluated with coordinated development model. The future trend was predicted using GM (1,1) model. The results showed that:(1) There was a complicated time-varying with nonlinear and dynamic coupling relationship. From 1997 to 2005, at the early stage of development, the land use type was barely coordinated and the development of land use lagged behind ecological environment with an unstable relationship and low coordination-level; From 2006 to 2011, the middle stage of development, the land use type was changed to elementary and intermediate level with the relationship tended to stable; The land use type was basically stable in well coordinated relationship since 2012. The relationship was developed orderly and steadily and showed a V-shaped trajectory. (2) Both of the evaluation indexes from 1997 to 2012 showed rising a trend and the main factor influencing the coordinated development degree was changed from ecological environment to land use gradually. Therefore, balancing the development speed of land use and ecological environment and regulating the land use type become more important for coordinated development relationship between land use and ecological environment.