This study presents a comprehensive analysis of how the financial and technological progress of major companies affects the innovation activities of smaller businesses both upstream and downstream. The study discovered that core enterprise financial and technology development greatly improved the innovative capacity of upstream, downstream and small firms. The development of advanced financial technology in core enterprises empowers small- and medium-sized enterprises (SMEs) through a variety of beneficial effects. These effects include expanding financing options via supply chain credit, optimizing resource allocation through information sharing, promoting cooperation incentives through innovation, and effectively managing risks. These efforts collectively contribute to enhancing the innovation capacity of downstream SMEs in supply chains.