This paper, based on references review of resources-based cities' industrial transformation, selects Shanxi's 9 mature resources-based cities to establish an index system in evaluating transformation capability of resources-based cities, which is used to evaluate their transformation capabilities and classification also by means of factor and clustering analysis. Results show Datong sits on top among mature resources-based cities in transformation capability, followed by Yangquan. Changzhi, Jincheng, Jinzhong, Yuncheng, Xinzhou, Linfen and Lvliang sits at the bottom. This paper presents approaches to industrial transformation for mature resources-based cities, offering references for other mature resources-based cities.