Medical big data is a hot research topic in China, and it is also the main research direction in the field of emergency medicine. The current situation of the construction of the first-aid big data platform and the construction of the first-aid clinical decision support system were analyzed, the problems existing in the development of the first-aid big data research field were enumerated, to explore the theoretical methods for promoting the development of domestic first-aid big data, so as to provide references for the research in related fields.