Abstract: In the management and development of large-scaled database, optimized design can improve its functions greatly. According to the discussion on performing query language of a large-scaled database, the authors propose an optimized design-optimizing multi-choice operation on the same form, choice operation on multi-forms, connection & choice operation on multi -forms, the using window and index. In practical application, the process of optimization, which is simple and effective, can decrease the amount of counting and internal storage, can speed up query execution and performance and has a stronger usage.