In the context of the rapid development of the digital economy,the digital transformation of the manufacturing industry is the trend.In order to maintain global competitiveness,China's manufacturing industry must accelerate its digital transformation.By innovating digital technology,manu-facturing industry can fully utilize two markets and two resources,and accelerating the construction of a new development pattern with domestic cir-culation as the main body and domestic and international dual circulation promoting each other.This article is based on micro data of Chinese listed companies and employs Python for text analysis to study the impact mechanism of digital transformation of Chinese manufacturing enterprises on their internationalization.The research indicates that digital transformation significantly promotes the internationalization expansion of manufacturing en-terprises,and mainly enhances their internationalization capabilities through three mechanisms:Firstly,cost efficiency.Digital transformation helps reduce production costs and enhance international competitiveness of manufacturing enterprises;Secondly,digital transformation helps promote en-terprise innovation and improve production efficiency;Thirdly,digital transformation helps enterprises diversify their supply chains,increase supply chain resilience and security.At the same time,the study found that there is heterogeneity in the impact of digital transformation on the internation-alization of manufacturing enterprises.Specifically,the impact varies among enterprises in different regions,different marketization levels,and dif-ferent types of ownership.Finally,this article proposes several policy recommendations for the digital transformation of manufacturing enterprises.