Te spatial pattern and evolution of urban system have been hot research issues in the feld of urban research. In this paper, the network analysis method based on the gravity model and the related measurements were used to reveal the properties of the spatial pattern and evolution of the urban system in the HRB (Huaihe River Basin) of China. Te fndings of this study are as follows: During the period from 2006 to 2014, the economic contact between the HRB cities has been strengthened, but the diferences between cities have been expanding. In general, the HRB cities have not yet formed a close network structure, and a trend of economic integration has not been found. Tis paper expresses the spatial pattern and evolution of urban system in an intuitive way and helps to explain the evolution mechanism of urban system. Te method was confrmed by empirical research. Because of the operational and visual expression, this method has broad application prospects in the urban system research.