Abstract: Large and complex electromechanical devices are usually composed of millions of components, and their information is generally organized and managed by tree structure. The design scheme of conventional structure tree cannot meet the management requirements of mass storage and efficient query. This paper implemented the efficient storage management of the structure tree model through designing the coding dictionary and establishing the structure tree template based on the Oracle database. And it accomplished the second level processing of one hundred thousand level data in the project of whole life cycle management for high-speed train. The development practice shows that the design scheme has the advantages of less storage cost, better data consistency and faster query speed, which are suitable for the management of super-large scale structure tree.