[Purpose/Significance] Educational big data platform information sharing has become an important content and research hotspot of current educational informatization work. [Method/Process] The influencing factors of information sharing were constructed, and DEMATEL was used to classify and rank the information sharing factors of education large data platform. [Result/Conclusion] The results showed that subject demand factor, accessibility factor and cooperation mode factor were the most critical factors affecting educational big data platform information sharing, resource richness factor and information usefulness factor were the core factors, and they were also the most vulnerable factors. Finally, the corresponding strategies and suggestions were put forward.