Abstract: In response to the problems of calculating the mileage of railway freight cars and parallel processing of multi-dimensional massive data, this paper designed a railway freight car mileage management and auxiliary analysis application system. This system integrated multiple sources of data and utilizes parallel computing technology to accurately calculate the operating mileage of railway freight cars and their important components, conducted statistical analysis on the distribution of freight car types and temporary maintenance fault mileage, effectively solved the problem of freight car periodic maintenance and expiration warning based on mileage, could provide data support for the reform of freight car repair procedure and the refined management of freight car accessories, improve the efficiency and level of railway freight car operation and maintenance.