BIN Hou,,MA Quan-cheng,WANG Huan-fang,ZHANG Wei-kang,HU Qin-fang
On the basis of verifying the relative effectiveness of R index, spatial Gini coefficient, Herfindahl-Hirschman index and EG index, R index is used to calculate the agglomeration level of energy-saving and environmental protection industries in China from 2008 to 2016, including the whole China, six major regions and 31 provinces, autonomous regions and municipalities, and the suggestions are put forward on optimizing the structure of energy-saving and environmental protection industries in combination with the agglomeration level of energy-saving and environmental protection industries in various regions. The results show that the distribution of energy-saving and environmental protection industries in China is relatively close, and the concentration level is increasing year by year. The agglomeration phenomenon in East China is obvious, and the agglomeration level is far ahead of other regions and continues to improve. The phenomenon of agglomeration is obvious in the central and southern regions, but the level of agglomeration is decreasing year by year. The distribution of North China is relatively close, and the growth rate of agglomeration level is lower than that of the whole country. The northeast, southwest and northwest regions are scattered, with a low concentration level and a small decline. There are great differences in the agglomeration level of energy-saving and environmental protection industries among provinces and cities, which can be divided into four categories:leading area, middle and upper area, middle area and backward area.