註釋 Abstract : Financial institutions have tightened their connections to digital technology in recent years as a result of the growth of Internet technology, and inclusive finance has steadily made the transition from traditional finance to digital inclusive finance. This research thus thoroughly examines the impact of the development level of digital inclusive finance on urban economic vitality and its mechanism of action from the perspective of innovation and entrepreneurial activity based on panel data of 41 prefecture-level cities in the Yangtze River Delta region from 2011 to 2020. The findings are as follows. (1) The development of digital inclusive finance significantly boosts the economic vitality of urban areas, and when it is broken down (breadth of coverage, depth of use, and degree of digitization), these three factors all contribute to urban economic development. Among them, the depth of its use has the most obvious influence, followed by the breadth of coverage, while the degree of digitalization is the weakest. (2) The promotion effect of digital finance on urban economic vitality varies regionally. Urban economic vitality is more strongly impacted by the overall degree of digital inclusive finance development in core areas than it is by that in non-core areas. (3) The economic impact of digital inclusive finance has a clear spatial spillover, as the rise in innovation and entrepreneurship in the region can boost the economic health of surrounding areas. (4) By supporting regional innovation and entrepreneurship, digital financial inclusion can boost the development vitality of the urban economy, but this effect has a double threshold impact on the overall level of innovation and entrepreneurship as well as innovation activity and entrepreneurship activity. In other words, increasing the marginal effect on economic vitality exhibits a non-linear characteristic of digital financial inclusion. Future developments in digital technology should be fully embraced, and the state of inclusive digital finance should be enhanced. Governments and relevant authorities should enhance the leadership roles of innovation and entrepreneurship and increase the contribution of mass entrepreneurship and innovation to urban economic growth. 