资金短缺是长期以来困扰西部地区经济发展的一个重要问题，招商引资已成为各地区振兴经济的一项重要举措。陕西省处在西部大开发的桥头堡地位，虽然对外开放的程度和步伐日益加快，但是经济发展远落后于东部地区，一个重要的原因就是资金不足。陕西省要实现经济的腾飞，就必须引进外资。一个地区能否吸引外资以及吸引外商投资额的多少，基本上是由被投资地区的投资环境决定的，因此，研究陕西省投资环境具有现实意义。 本文阐述了投资环境评价的理论；依据构建指标体系的六大原则，构建了由一层4个指标、二层16个指标、三层35个指标组成的投资环境评价指标体系。运用因子分析法对陕西省5年来投资环境变化作了纵向比较，对2005年陕西省和东部10省市投资环境作了横向比较。运用聚类分析法划分了陕西省各市投资环境类型；提出了优化陕西省总体投资环境、陕西省不同类型区投资环境的建议和对策，以实现陕西省各地投资环境的均衡发展。 希望本文的研究为优化陕西省投资环境、更好地吸引外资提供决策依据，从而实现陕西省经济的快速、均衡发展。

The serious problem, like shortage of fund, has plagued the economic development in western regions for a long time. Introducing foreign investment into the region is an important economic revitalization initiative. Shaanxi Province is located at bridgehead position in Western Development. Although the extent and pace of opening to the outside world is accelerating, the economic development is far behind than eastern regions. Insufficient fund supply may be the reason. It is necessary to introduce foreign investment to speed up the economy of Shannxi Province. The scale of foreign investment for a region is basically dependent on its Investment Environment. So studying on Investment Environment in Shannxi Province is practically significant. This paper elaborates the theory of Investment Environment Evaluation, constitutes an Investment Environment Evaluation Index System according to six principles, which has four indexes for the first level, sixteen for the second and thirty-five for the third. This paper evaluates the Investment Environment in Shannxi Province during recent five years and compares the Investment Environment in Shannxi Province with ten eastern provinces’ by Factor Analysis. This paper compartmentalizes the type of Investment Environment in every region of Shannxi Province by Cluster Analysis. Based on the evaluation and compartment, some proposal are offered, in order to optimize the whole Investment Environment and the Investment Environment in different regions to achieve the balanced development. This paper provides a better basis for decision making to optimize the Investment Environment in Shannxi Province and introduce more foreign investment, so as to realize the rapid and balanced economic development of the province.