Abstract: In order to promote the data resources sharing of railway freight cars and promote the application of big data technology in the field of railway freight cars, this article put forward the overall design scheme of big data platform for railway freight cars.Based on the analysis of big data sources and data characteristics of railway freight cars, the article designed the overall structure and technical framework of big data platform for railway freight cars based on big data acquisition and storage technology, big data management technology, big data algorithm and model, and big data calculation and analysis technology. It provides design basis for the construction of big data platform for railway freight cars. At present, the construction of big data platform for railway freight cars based on the design scheme has been carried out in China Railway.