With globalisation and the diversification of market demands, companies face increasingly complex supply chain management challenges. As a leading automaker, Geely's efficient operation of its supply chain is critical to maintaining market share and customer satisfaction. This study uses Geely Automobile as a case study to explore the impact mechanism of digital transformation on corporate supply chain competitiveness. Analysing Geely Automobile's digital transformation practices reveals the positive impact of digital transformation on corporate performance and supply chain resilience. The findings show that digital transformation significantly improves corporate performance, especially in key financial indicators. At the same time, digital transformation enhances firms' resilience in the face of risky shocks, making them more resilient to market changes and risks. However, the study also identified challenges and limitations in the digital transformation. Future research could provide further insights into the relationship between digital transformation and internal management factors and the impact of new technologies on supply chain management and firm performance to guide firms to achieve sustained growth and enhance competitiveness.