Based on the panel data of China's non-financial A-share listed companies from 2011 to 2021, this paper empirically examines the impact of entrusted loans of non-financial enterprises on audit pricing and its mechanism. The article reveals that entrusted loans of non-financial enterprises can significantly increase audit pricing, which is more significant in enterprises with equity-related entrusted loans, high complexity of entrusted loan business and tight monetary policy. Mechanism tests suggest that operational risk and audit delay are some of the mediating factors that increase external auditor's audit pricing for non-financial firm mandated loans. The research of this paper enriches the relevant theoretical research on audit pricing from the perspective of entrusted loans of non-financial enterprises.