BIM technology is a system engineering technology based on three-dimensional digital technology to improve the quality and efficiency of various links in the complex construction industry. It integrates the data model of energy consumption information among the structural parameters in complex buildings [5-6]. Because BIM technology uses three-dimensional digital model and complex building parametric correlation technology to build the model. It is not only the geometry drawing tools of simple point, line and surface, but also the relationship between complex building exterior walls, windows, roofs, components and building energy consumption, so as to achieve the integration of energy consumption information [7].In BIM technology, integration of all energy consumption information of complex building is to integrate all energy consumption data of components in complex building engineering. Figure 1 is the flow chart of energy consumption analysis of complex building based on BIM technology.