中国科学院于2000—2005年成功实施中国科学院西部行动计划（一期），于“十一五”期间继续实施西部行动计划（二期）。在继续深化和扩展西部原有5个典型区域（北方草地、黄土高原、黑河流域、塔里木河流域、岷江上游）生态建设试验示范研究的基础上，新增西南喀斯特、三峡库区和三江源区等3个试区的生态建设试验示范研究；开展黑河流域遥感?地面观测同步试验与综合模拟平台建设、青藏铁路冻土路基稳定性与沙害防治等研究工作；开展太阳能等特色资源开发及其他服务于西部大开发的高技术研究与产业化等方面的工作。该计划已按实施方案陆续展开，启动实施11个项目，在试验示范区/点的选定、设施建设、观测、试验、研究与示范等方面的进展顺利，取得一批阶段性成果。

The Chinese Academy of Sciences (CAS) initiated the CAS Actionplan for West Development in 2000, and the first phase of the plan ended in 2005 with great achievements and new proposals. The plan stepped into its second phase in 2006, while some of the research projects launched in the first phase continued, and several new ones started. Researches and demonstrations on degraded ecosystem restoration in 8 typical regions in the west of China such as Xilingele Prairie, Loess Plateau, Heihe River Basin, Tarim River Basin, Upstream River Basin of Minjiang, Karst Region in southwest China, the Three Gorges Reservoir Region and the Three Rivers Source Region, are being conducted; synchronization experiment of remote sensing and ground observation for comprehensive data acquisition in the Heihe River Basin has been initiated; and key technology research and equipment development for the grid connected photovoltaic systems in the west of china is been implemented. Researches on the stability of frozen soil roadbed of QinghaiTibet railway and sand disasters along the railway, and high technology development and industrialization critical to the West Development, are going to be conducted soon. The paper illustrates the research project arrangement in the second phase of the CAS Actionplan for West Development, and introduces the primal progress of those initiated projects.