Traditional supply chain finance has played a certain role in alleviating the financing difficulties of small, medium-sized and micro enterprises, but it also shows its limitations, especially the problems of information island and default risk caused by information asymmetry. In recent years, new technologies such as big data, artificial intelligence and blockchain have been continuously integrated into supply chain finance and optimized the financial structure of the supply chain.Different from the traditional supply chain finance, with the help of blockchain technology, supply chain finance can improve the existing operation mode and explore innovative measures of supply chain finance, so as to promote the supply chain finance business to better serve the real economy, improve the financial ecology and help solve the financing problems of small, medium and micro enterprises.