通过分析黄土高原生态环境和生态建设的现状 ,进一步理解在中央决定实施西部大开发战略的新形势下 ,朱钅容基总理有关加强生态环境建设指示的重要意义。并以延安 6 5 0 km2 山川秀美示范区建设为例 ,探讨了生态环境建设的阶段、目标、模式及科技试验示范的主要任务 By analyzing the status quo of the ecological environment and ecological construction in the Loess Plateau, I further understand the importance of Zhu Rongji’s directive on strengthening the directives for ecological environment construction under the new situation that the Central Government decided to implement the strategy of developing the western region. Taking the construction of beautiful demonstration area of ​​6500 km2 in Yanan as an example, the paper discusses the stages, targets, models and major tasks of scientific and technological experiment demonstration