Abstract: To address the problems of difficult multi-stakeholder coordination, separation between models and data, and information silos among systems in the construction of intelligent high-speed railways, this paper designed and implemented a railway model-data integration platform, focusing on the requirements of full-life-cycle management for railway projects. Based on the theory of "model-data driven and axis-plane collaboration", the platform established a complete functional system covering data management, model management, model-data calculation, model-data services, and model-data visualization. It proposed key technologies including model-data correlation mapping and collaborative computing, realized centralized management and collaborative invocation of multi-source heterogeneous data and multi-type models, and supported high-performance computing and multi-dimensional visualization. Application results show that the platform provides technical support for interdisciplinary data sharing, model reuse, engineering state perception, and auxiliary decision-making.