The quality control of water conservancy and hydropower grouting project has been a difficulty in the industry for a long time because of its hidden operation, large amount of data and strong experience. Guided by the core values of BIM (Building Information Modeling), the three-dimensional visualization analysis method of grouting engineering based on GIM (Geological Information Modeling) is researched in this paper to improve the efficiency and effectiveness of grouting analysis following the idea of “real-time monitoring, rapid analysis and dynamic feedback” in the whole process. The analysis method includes the construction and analysis of GIM model, the parameterization and visualization of grouting engineering, the real-time monitoring and visualization of grouting process, etc. On this basis, a 3D visualization analysis system of grouting engineering based on GIM is developed. Engineering practice manifests that the present method could accomplish the prediction of geological conditions of grouting holes in advance, the real-time monitoring and abnormal diagnosis in the grouting process, and the rapid analysis and evaluation of the results after the process, hence offering reliable technical support for the quality control and management of concealed grouting project.