Abstract: Promoting the development of county-level economy is an effective way to achieve integrated urban-rural development and rural revitalization. Based on panel data from 2419 counties in China from 2013 to 2020, the multi-time point double difference method was used to analyze the data. This article analyzes the impact of the comprehensive demonstration county policy of e-commerce entering rural areas on the county-level economy through empirical research. The results show that the comprehensive demonstration county policy of e-commerce entering rural areas significantly promotes county-level economic growth. The policy effect exhibits significant heterogeneity in different geographical regions. The policy of e-commerce entering rural demonstration counties not only shows a promoting effect in flat terrain areas, but also significantly promotes economic growth in mountainous areas with large terrain undulations. Therefore, the policy of e-commerce entering rural demonstration counties has achieved county-level economic growth through the promotion effect of digital inclusive finance index and market driven effect.