The on-board data integration and collection system is based on the collection of the train's MVB (Multifunction Vehicle Bus) control network and Ethernet information network. It features core functions such as the collection, fusion, pre-processing, data parsing, centralized recording, and unified transmission of all status data of the train. At the same time, through product configuration solutions, it can support the construction of a train-level monitoring Ethernet network and a unified maintenance port. It can enable high-speed wireless offloading of the device's own data, and also support data transmission based on new ultra-high-speed vehicle-to-ground wireless communications such as 5G. The on-board data integration and collection device can support the remote tracking and monitoring of trains to ensure operational safety, enable the automatic and complete transmission of data for train fault analysis, and support the application of full-lifecycle health management of trains in the ground center system.