中文摘要：

在科技革命和产业变革迅猛发展的新形势下，政府采购成为世界主要国家促进科技创新的有效手段。对于中国来说，在积极参与世界贸易组织《政府采购协议》谈判背景下，如何既遵照国际惯例，又能够有效地发挥政府采购促进科技创新的政策功能变得尤为重要。本文首先对国内外政府采购相关政策和举措进行系统梳理，将我国政府采购促进科技创新的政策作用机制分为五个维度；其次，通过政策计量、实地调研、案例分析等方法，对北京市的政策作用机制及效果进行实证分析并与国内其他典型地区进行比较，发现北京市存在的问题以及其他典型地区可借鉴的经验；最后，研究提出了北京市政府采购促进科技创新的政策改进建议，对国家层面及地方层面的政策改进也具有参考价值。

英文摘要：

In the situation of rapid development of science and technology, government procurement has become an effec- tive tool of promoting scientific and technological innovation in major countries. For China, in the context of GPA acces- sion negotiations, how to play the policy function of government procurement to promote technological innovation effec- tively and correctly has become particularly important. First, by combing the relevant policies and measures at home and abroad, the policy mechanism of Chinese government procurement to promote technological innovation can be divided into 5 aspects. Based on the above five dimensions, the empirical analysis of the policy mechanism and effect of Beijing is made and compared with other typical regions in China through policy bibliometrics, on-site investigations, case analysis and other methods. So the problems of Beijing and the experience of other regions which can be used for reference are found. Finally, this paper puts forward some feasible recommendations in Beijing＇s policy formulation and implementation, which can also provide support for the improvement of government procurement policies in regional and even national level.