Presently, it's more urgent to develop the integrated CAD system that the database is the kernel. In order to support this integration, many jobs need to be done, and all of them, it's a very important means to provide a convenient developing environment which can generate interface bet-ween database and applications automatically. In this thesis, they analyzed the general function and structure of this kind of interface, and then, put forward a general model of interface developing environment between database and applications, which based on software reusable method-DDBUIS. Combining the two reusable methods, DDBUIS attempts to generate the interface between database and applications automatically, and also provides reusable supporting for software developers during developing other systems.