This study proposes a dual verification monitoring method integrating BIM lightweight modeling and real-time matching of laser point clouds.Based on the construction drawings of the substation base,a BIM model of the equipment maintenance schedule plan within the substation base is constructed.The fault-tolerant BIM lightweight process of the QEM (Quadratic Error Measurement) algorithm and the triangulation folding method is adopted to perform lightweight conversion on the established BIM model to reduce the error after lightweight conversion.The experimental results show that under the application of this method, when the simplification rate is 55%, it can effectively achieve lightweight while ensuring the accuracy, completeness of the model and no information loss. It can accurately monitor the maintenance progress of different equipment in the substation, realize the visualization of multi-equipment parallel maintenance data, significantly increase the overall maintenance time, and verify the reliability of this method.