In order to ensure the safety of heavy haul train and satisfy the demand of development and maintenance of locomotive wireless reconnection system, a running data record software based Zlib compression techniques was developed. Based on the CPU board of locomotive wireless reconnection system, the line operation data of heavy haul train could be collected, compressed, recorded and downloaded through Ethernet to PC, and analyzed on ground analysis software. The proposed software had be applied in SS4 series and Shenhua locomotive wireless reconnection system, and provided precise field data for actual fault analysis, which was an important base for development and maintenance of the locomotive wireless consists system.