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Aiming at the problems that the current BIM model data is huge and needs professional software to view, it has strict requirements for computer software and hardware, and it is very inconvenient to display the model in the C/S architecture. A lightweight display of BIM model and adaptive rendering control are proposed. method. This method takes the Revit model as the research object, firstly uses the secondary development technology to write a plug-in to automatically extract the model information and convert it into the glTF format; then compress the glTF format through the data optimization algorithm, and use the WebGL technology and the Three.js framework to parse the glTF format to realize the model. Finally, through the LOD-AD optimization algorithm, the triangular patches with a long distance and a small volume are eliminated, and high-level components are preferentially rendered when the frame rate is low, so as to complete the adaptive control effect in the rendering process. . The experimental results show that this method greatly reduces the model volume and model transmission time under the premise of ensuring model fidelity, and the adaptive control of the scene can effectively eliminate low-importance components and achieve the effect of significantly improving rendering fluency. , which provides a feasible reference solution for lightweight display and rendering control of BIM models.