Evaluation and comparative study on county economy between Guanzhong-Tianshui economic zone and Lanzhou-Baiyin economic zone

County economy is the important foundation for the development of economic zone. This paper takes 49 counties in Guanzhong-Tianshui economic zone and Lanzhou-Baiyin economic zone as the research objects, establishes evaluation index system of county economy, and applies the factor analysis to make empirical study, extracting economic structure factor, agricultural development power factor, economic scale factor and living standard factor as the 4 main factors, then makes cluster analysis of the 49 counties based on factor analysis. The results show that the whole county economy level of Guanzhong-Tianshui economic zone is higher than Lanzhou-Baiyin economic zone, while the Guanzhong-Tianshui economic zone faces the problem of unbalanced development. The county economy爷’ further development of economic zone should attach great importance to the agricultural industrialization, the optimization and upgrading of industrial structure and cultivating the local pillar industries in order to realize the sustainable development.