As an informal financing channel, trade credit financing is an important source of direct financing and short-term financing for companies, and plays an important role in easing the financing constraints of companies. This paper takes A-share listed companies from 2007 to 2021 as research samples to investigate the impact of digital transformation on corporate trade credit financing. It is found that digital transformation significantly promotes trade credit financing, and this promoting effect is more obvious in companies with higher industry competition, non-state-owned property rights and low bank credit availability. The analysis of influence mechanism shows that digital transformation mainly promotes trade credit financing through enhancing the competitiveness of product market, reducing the concentration of suppliers, improving the information environment. Further analysis shows that the improvement of the degree of digital transformation will also help enterprises to obtain trade credit financing with a longer term. Finally, the economic consequences test found that the effect of trade credit financing brought by digital transformation significantly improved the total factor productivity of enterprises. The above results mean that accelerating digital transformation is an important means for enterprises to adapt to the pains of transformation and upgrading in the new development stage, promote enterprise financing, help alleviate the financing difficulties of enterprises, and help enterprises develop in high quality.