The regional development strategy system is an important part of the national strategy system. Giving full play to the synergies of regional development strategies is very important to promote coordinated development across regions. Focusing on the historical mission of coordinated development across regions, China has continuously strengthened top-level design and macro planning, built a regional development strategy system with Chinese characteristics, and gradually formed strong strategic synergies.

This paper systematically reviews the system structure and evolution of China’s regional development strategies, makes a theoretical analysis of the synergies of regional development strategies, and uses a double-weight spatial econometrics model to carry out an empirical test. The study finds that: (1) Through the optimization and reconstruction of spatial pattern, cooperation and interaction across regions, and the superposition of the advantages of convergence regions, the powerful synergies of the regional development strategy system can be released. (2) From the perspective of the whole research period, there is absolute convergence in China’s regional economy, but there are differences in the convergence characteristics in different periods. There is a divergence trend before 2006, and absolute convergence after 2006. (3) Conditional convergence exists in all periods, taking into account the spatial correlation. With the integration and coordination of major regional strategies and regional strategies of the four major sectors, the speed of economic convergence has been accelerated, and the spatial autoregressive coefficient has been further improved, indicating that the synergies of multiple regional development strategies have become increasingly apparent, which can effectively promote coordinated development of the regional economy. In addition, China has combined the formulation and implementation of regional development strategies with geographical factors, effectively narrowing the regional economic gap. (4) On the new journey, China should focus on strengthening the integration and coordination of regional development strategies, building a regional economic layout with complementary advantages, and improving the mechanism of coordinated development across regions.