The rapid development of digital financial inclusion is profoundly changing the financing environment for small and medium-sized enterprises (SMEs). As an important driver of economic growth and innovation, SMEs account for a significant share of employment and GDP globally. However, the traditional bank credit model has long failed to effectively meet the financing needs of SMEs due to issues such as information asymmetry, high cost, and difficulty in risk assessment, resulting in serious financing constraints. Digital financial inclusion, through technological innovation and big data analysis, has significantly reduced credit costs, alleviated information asymmetry, and provided SMEs with more flexible and efficient financing channels. Research shows that digital financial inclusion can not only ease the financing constraints of SMEs, but also promote their innovation and growth, providing important support for building a more inclusive and sustainable financial ecosystem.