With the development of hardware and network technology

electronic publishing is widely used nowadays on Internet.However there are many difficulties to render electronic documents properly for various reading devices

because it is hard to merge fixed layout and fluid information together due to the significant difference between them.Some methods have been proposed to solve this problem

but the final results are not ideal.In this paper we proposed a novel document model based on page block

and fixed layout and fluid information are both constructed on it.This method can merge fixed layout and fluid information together for electronic publishing and adapt to various reading devices.The experimental results show that the document model proposed in this paper performances well in practice.