This article explores the promotion and application of big data platforms in the development of smart tourism. Firstly, it outlines the concept and development trend of smart tourism, emphasizing the problems of information silos and single experiences in traditional tourism industry. Subsequently, the role and significance of big data platforms in smart tourism were elaborated in detail, and the driving role of big data platforms in the development of smart tourism was explored. Based on this, the potential role of big data platforms in optimizing tourism resource allocation, improving service quality, and promoting industry upgrading was further analyzed. Finally, the significance and future development trends of smart tourism driven by big data platforms are summarized, and it is emphasized that big data platforms will become the core driving force for smart tourism. Through the application of big data platforms, smart tourism can better meet the needs of tourists, promote sustainable development of the tourism industry, improve tourism experience, and promote innovative development of the tourism industry.