In the implementation of metallurgical renovation projects, challenges often arise such as incomplete original design data, inaccurate technical transformation information, and limited available space. Reality restoration technology reflects the actual conditions of the renovation site by integrating real-life models with BIM models. This integration helps improve the precision of renovation planning, design, and construction, thereby reducing investment costs. Using the blast furnace renovation project as an example, this paper introduces the BIM application method integrated with reality restoration technology and examines key technical points, including indoor laser point cloud scanning and outdoor oblique photography. The study explores the technical route and method for integrating real scene restoration models with BIM models, and innovatively develops a 3D design tool based on point cloud data that can directly extract design parameters for 3D component fitting.