Resources-based cities need sustainable development, which can be directly affected by industrial structures. This paper, selecting similarity factor, location quotient and specialization index of industrial structure as major indexes scaling the industrial specialization in resources-based cities, based on a case study of Jiaozuo city, indicates that mining industry prevails in Jiaozuo city and the new industries such as electricity, gas and water are forming concentration with a notable predominance in the whole province. The key point shall be construction and manufacturing, and highlight the industrial structures as an industrial feature.