Against the background of accelerated globalization and increasingly fierce international competition, all countries are exploring modernization and development paths in line with their own national conditions. Based on the theoretical framework of the synergistic development of Chinese-style modernization and national rejuvenation, this study constructs an evaluation index system containing four criterion layers, namely, social security, social justice, social order, and social interaction, applies the entropy method to determine the weights of each index, and establishes an obstacle degree model to identify constraints. Taking 13 cities in Jiangsu Province as research objects, the level of synergistic development of each city is calculated through dimensionless processing and standardized operation. The results show that the comprehensive scores of synergistic development of the 13 cities in Jiangsu Province are all above 65 points, with Nanjing (72.955 points), Suzhou (72.650 points), and Wuxi (71.020 points) ranking in the top three; the social order criterion layer has the highest weight (0.3387), and the social justice has the lowest weight (0.1423); the analysis of the degree of obstacles shows that social justice and social order are constraints on the synergistic development of the The obstacle degree analysis shows that social justice and social order are the main factors constraining the synergistic development, and the obstacle degree of social interaction in Nanjing reaches 0.2215. The study suggests that the synergistic development of Chinese-style modernization and national rejuvenation needs to take multi-dimensional factors into account in an integrated manner, and achieve high-quality synergistic development through improving institutional design, optimizing resource allocation, and strengthening policy guidance.
