In recent years, with the rapid development of domestic pharmaceutical industry, the development of China’s large scientific instruments in the category of medical diagnoses and analyses has been very fast. Based on the statistics and the computation methods of spatial Gini coefficient for 2008-2012, this paper has discovered that the density of regionally distributed Chinese medical diagnostic and analytical instruments has not changed much, with the eastern regions obviously outperforming central and western ones. A three-dimensional structure of Hall type has been used to build a development indices comprehensive evaluation model for China’s large scientific instruments in the category of medical diagnoses and analyses, and measurement and calculation have been made. According to the results, it is obvious that the eastern regions are better in terms of equipment and utilization levels, but the difference in the level of sharing is not obvious, and this shows that a higher level of configuration does not necessarily mean a higher level of sharing. This article ends with some relevant advices on policies for regions at different levels of development indices.