According to existing rail line construction causing the problem of LKJ data reloading and the current status of LKJ datareloading operation, a technical scheme was proposed of combining the LKJ infrastructure data provided by balise and the LKJ temporarydata provided by IC card to supply LKJ train control data, and the further research was launched on the balise setting, balise messages, thedesign of LKJ temporary data, the control logic of switching between various sources of the LKJ infrastructure data. The actual operationshowed that the mentioned scheme reduced the LKJ data reloading real-time requirement and reloading frequency, which guaranteed thevehicle operation safety.