Abstract: With the quickly development of enterprise informationized, it is urgently required to study a distributed heterogeneous database transparent access system with low price, high efficiency and high reusability. Conbing with the current data integration and access to technology, this paper proposes a way to establish the distributed heterogeneous database transparent access system by using middleware architecture, virtual database strategy and XML as a means of data interchange, aiming to develop a database transparent access system that is easy-to-use, high efficiency, and transplanted reusable. The system has been used in the digital simulation platform of high-speed trains, and the experimental results show that the scheme is an optimal solution.

Key words: data integration, virtual database, database transparent accessing