中文摘要：

运用锡尔系数分解法，借助SPSS16．0和arcgis9．3软件系统地分析了内蒙古自1987年以来区域经济的时空差异及其演化过程。结果表明，在时间上内蒙古区域经济的绝对差异和相对差异都在逐渐扩大，2005年后呈急剧扩大趋势；在空间上蒙中地区的经济发展水平明显高于蒙东和蒙西；从分解分析来看，区内三大地带内和地带间差异都有逐渐扩大的趋势，地带间差异是构成差异的主要因素。研究认为，内蒙古区域经济差异已经达到了限制经济发展的程度，形成差异原因包括资源、市场、政策和全球化等因素。

英文摘要：

This paper mainly uses method of theil index decomposition. With the help of SPSS16.0 and arcgis9.3 software systematically, it analyses the regional economic disparities and evolution in Inner Mongolia since China＇ s reform and opening up. It shows that the absolute and relative regional economic disparities in Inner Mongolia are increasingly great in terms of time, especially from 2005. And the level of economic development is much higher than the east and west areas of Inner Mongolia in terms of space. From the perspective of decomposition analysis, the economic disparities are increasingly large within and between three big areas, and the disparities between areas is the main factor of the whole regional economic disparities .The reasons of these disparities which restrict economic development include resources, market, policies and globalization.