Abstract: In the era of digital economy,digital transformation has paid enterprises technology dividends,but the transformation has also posed new challenges to their operation and management.Based on the data of manufacturing listed companies from 2010 to 2020,this paper discusses the impact of digital transformation on the internal control of enterprises,and analyzes the mediating role of agency costs and human capital in these two.The findings show that the digital transformation of enterprises significantly improves the internal control of enterprises.In terms of mechanism,the digital transformation promotes the optimized internal control of the enterprises by reducing the agency costs of enterprises.And the complementary effect that exists between the digital transformation of enterprises and the human capital can further improve enterprises' internal control.In addition,the heterogeneity investigation shows that digital transformation has a better promoting effect on the internal control of eastern and western enterprises.This study provides a useful reference for how to improve the internal control of enterprises in the process of their transformation and upgrading in the context of digitalization.

Key words: digital transformation, internal control, agency costs, text analysis