Based on the data of China 's Shanghai and Shenzhen A-share listed companies from 2017 to 2021, the multiple linear regression model was used to empirically test the impact of environmental uncertainty on trade credit financing, and to explore the regulatory role of managerial ability between environmental uncertainty and trade credit financing. The research shows that the increase of environmental uncertainty will significantly reduce the company 's trade credit financing, and the managerial ability can effectively alleviate the negative relationship between the two, and the results are still valid after the robustness test. The research results have certain reference significance for enterprises to alleviate the financing constraints of trade credit and for relevant departments to regulate the trade credit market.