Using a sample of China's A-share listed companies from 2011 to 2018, this research examines the impact of financial technology (FinTech) on financing constraints experienced by enterprises. Results show that the development of FinTech can significantly reduce firms' financing constraints, and this effect is partially mediated by facilitating firms' direct and indirect financing, and by promoting inter-bank competition. The mitigating effect of FinTech is more pronounced in non-state-owned enterprises, in small- and medium-sized enterprises, and enterprises in the more highly developed eastern region of China. The direct mitigating effect of FinTech on reducing financing constraints is stronger for companies with a higher level of innovation or a lower level of social responsibility performance. Theoretical and practical implications of our findings are discussed.