Abstract: The deep electrification of the traffic system and the rapid development of novel power systems strengthen the coupling between the traffic system and the energy system, and the traffic network and the energy network show the trend of deep integration. The data integration between the two networks is the key technology to realize the efficient interaction and cooperative operation of the two networks. Based on the concept of traffic-energy Internet, the architecture of a traffic-energy integrated big data platform is proposed. The challenges and difficulties are analyzed facing the traffic-energy integrated big data platform in data fusion, analysis, application and security, and the key technologies required for the construction of the big data platform are summarized. Combined with the preliminary exploration of traffic-energy Internet in practical engineering projects, the typical application direction of the traffic-energy integrated big data platform is given. Finally, the application prospect of the traffic-energy integrated big data platform is prospected.