This study examined whether enterprise digital transformation impacts the relationship between managerial overconfidence and cash holdings. As its quantitative analysis approaches, it employed the fixed effect method and the generalized method of moments. Firstly, a positive relationship can be found between managerial overconfidence and cash holdings. This study uses behavioural finance to explain why overconfident managers always hold more cash. Secondly, this study aims to contribute further to the field of investigation, providing additional insight into this matter. This study highlights the significance of digital transformation in mitigating the cognitive bias of overconfident managers and ensuring the organization’s successful development in a highly competitive market. This study finds that enterprise digital transformation effectively mitigates overconfident managers holding excess cash during operations. This research not only enhances the understanding of enterprise digital transformation in relation to economic repercussions but also contributes to the affection of digital economic transformation on the corporate governance of Chinese listed companies.