Sports events are the key link between public demand and industrial development. Against the strategic background of boosting consumption and expanding domestic demand, the value creation function of sports events has become increasingly prominent. Jiangsu Football City League (JFCL), as an emerging regional sports event, has achieved in-depth integration of sports events with the economic society by virtue of its innovative operation model and solid mass foundation, and effectively stimulated regional economic growth. This paper systematically analyzes JFCL’s direct economic benefits and its long-term effects in promoting industrial development, enhancing city image, and advancing regional coordinated development, while exploring the economic significance embodied in it. This paper finds that, on one hand, JFCL is positioned as a mass sport event, activates potential public demand through supply-side innovation, attracts participants and public attention with its low entry thresholds to consolidate its mass base, stimulates consumption potential by leveraging emotional value, and creates innovative consumption scenarios while extending consumption chains through the integration of culture, tourism, and sports, thereby initiating and amplifying the consumption multiplier effect. On the other hand, the effective cooperation between the government and the market provides institutional support for the event, and the new media platform empowers it; together, they have constructed a dynamic event ecosystem, ensuring the full realization of the multiplier effect. Therefore, to provide practical references for the high-quality development of the sports economy and help boost consumption and drive regional economic growth through sports events, the paper puts forward policy implications such as strengthening support for mass sports events, innovating event planning and cultural exploration, promoting industrial integration, transforming the government’s role, and improving the new media empowerment for sports events.