The invention relates to a method and device for packaging and reuse of a page module and belongs to the technical field of off-line digital simulation of electric power systems. According to the invention, a source program document of the page module is generated through compilation; the source program document can be modified and simplified directly; the document is compiled to generate a corresponding binary object document; and the page module is packaged into a library element. During the whole course, the method and the device provided by the invention do not need to form and process header documents of the page module; code text formation rules do not need to be re-defined, and a construction interface of a library function, an initialization interface and a task calling interface for a running stage do not need to be re-compiled; and graphic symbols after packaging can be formed without analysis of page programs or topology wiring, so operations are simpler. Difficulty in programming and debugging is greatly reduced; and workloads for the packaging are reduced.