Abstract: Based on the vision of innovative, coordinated, green, open and inclusive development, this paper measures the high-quality economic development level of 31 provinces by using the time series global principal component analysis method. Then, we use the Dagum Gini subgroup decomposition method to decompose the regional differences, and decomposes the regional differences with the coupling and cooperation method. Finally, according to PVAR, the interaction mechanism between new development vision and high-quality economic development level is discussed. The main findings are:(1)The overall difference in China's high-quality development level has decreased, the internal multi-level differentiation is increasingly apparent, while the structure of regional differences is stable, and the super variable density difference is the main source. (2)In recent years, China's high-quality development level has reached a strong correlation with the new development concept, but the coupling coordination degree has not yet reached convergence. The level of coupling and coordination in the eastern region is generally high, while the central region develops the fastest. Although some western provinces are still in the stage of mild maladjustment, most provinces are on the verge of maladjustment. (3)There is a short-term interaction between new development vision and high-quality development. The eastern region has prominent impact on innovation and opening, while the central and western regions have more advantages in green and coordination.

Key words: high quality economic development, new development philosophy, coupling coordination, spatial distribution