Innovative protection of cultural heritage plays a crucial role in enhancing national cultural confidence. This paper proposes a refined three-dimensional animation reconstruction framework for historical buildings based on three-dimensional laser scanning and photogrammetry, enabling component-based information management driven by point cloud data. Through key technologies such as establishing an independent coordinate system, point cloud slicing, and real texture mapping, high-precision modeling of complex components in historical buildings is achieved. Research findings indicate that the maximum planar error and elevation error in 3D animation modeling of historical buildings are only 0.011m and 0.008m, respectively. MEAN, RMS, and STD are all below 0.005m, EOA is below 0.300%, and modeling time does not exceed 12 seconds. In expert and public evaluations, satisfaction with the preservation of the historical appearance of historical buildings was the highest, reaching 0.939 and 0.912, respectively, demonstrating the significant effectiveness of modeling technology in assisting historical building conservation.
