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In order to discuss and solve the data mining problem of intelligent expressway, this paper take the G4(Beijing-Hongkong-Macao) expressway, Zhumadian-Xinyang section as an example. Through designing the data mining platform for intelligent expressway in terms of planning ideas and contents, classification of existing data resources, data resource architecture, data flow design, data sharing design, etc. to provide a reference for the establishment of a real-time, accurate and efficient data sharing and mining mechanism.