Due to the simplicity and efficiency of BIM technology, it can be applied to all aspects of decoration engineering. This article is based on BIM modeling software for secondary development and a project in Yunnan. The Revit was used to obtain the boundary of the room, and then automatically create a decorative model through the boundary. Then the name of rooms was screened through the node WH_Filter. ByNameContain in Dynamo. After the screening, the Dynamo was reused to arrange the wall, floor, and ceiling decorative surfaces of the room and the secondary development of BIM was applied to quickly create families and modify related decorative surface properties. BIM model is used to simulate and analyze the design, construction process and management of decoration engineering, which can provide quick and effective help for the decoration engineering in design, construction and installation. The results show that the BIM model can be visually adjusted and simulated, which greatly enhances the communication efficiency between the decoration and the building parties. BIM technology can effectively cut expenses, shorten the construction period, and maximize the benefits in decoration engineering.