Abstract: The related concepts and technologies of bim have been rapidly developed since their introduction in China, and they have played a key role in many large-scale project projects. BIM technology has functions such as deepening design, pipeline synthesis and pipeline collision detection, and construction schedule simulation control. However, the conventional BIM model has a large amount of data, and the hardware requirements are too high, which makes BIM have some obstacles in the promotion process. This article takes concrete engineering as an example, using lightweight technology to guide the construction of electromechanical engineering through the output of BIMBox platform. The results prove that lightweight technology can reduce hardware requirements and effectively improve work efficiency and fine management of construction.