The internal representation of objects in ODBMS (object-oriented database management system) determines the way to store and access the objects. In this paper, a kind of object representation method——RSBO (refined synchronous buffers of objects) is introduced. The method is a refinement of SBO (synchronous buffers of objects), which is a kind of object representation. With RSBO, an object having sophisticated structure is resolved into relatively simple object sectors (pieces of the object). Based on SBO, RSBO considers the mechanism of object pointer sectors, which is an expansion of object pointers. Pointer sectors not only have the similar properties of SBO sectors, but also support set-oriented computation. The access methods and possible index structures on RSBO are also discussed. The traditional index method can be still used on RSBO.