针对如何实现历史建筑数字孪生模型动态更新这一问题，提出一种“构建-对比-更新”的更新思路。首先，在完成历史建筑数字孪生模型构建的基础上，借助形状分布法，绘制不同时点下构建的历史建筑数字孪生模型的形状分布曲线；其次，利用平均绝对误差法的变形实现两种模型的相似度评估；此外，根据不同的相似度评估结果，设定历史建筑构件模型的更新策略，并借助相关软件完成数字孪生模型更新；最后，以弘慈寺玉佛殿斗拱柱构件为对象进行实例验证。结果表明：所提出的历史建筑模型更新思路及其实现方法不仅为实现历史建筑数字孪生模型动态更新奠定了基础，还为历史建筑的智能化保护提供参考价值。

Aiming at the issue of how to realize the dynamic updating of the digital twin model of historic buildings, a "build-compare-update" updating idea was proposed. Firstly, the shape distribution method was used to draw the shape distribution curve of the digital twin model of the historical building at different time points, based on completing the construction of the digital twin model of the historical building. Secondly, the mean absolute error method was used to assess the similarity of the two models. Furthermore, according to the results of the similarity assessment, the updating strategy for the model of the components of the historic building was set up and the updating of the digital twin model was completed with the help of relevant software. Finally, to validate the design, the arch column component of the Jade Buddha Hall of Hongci Temple was used as a case study. The results show that the proposed idea of updating the historical building model and its implementation method not only lay the foundation for realizing the dynamic updating of the digital twin model of historical buildings, but also provide reference value for the intelligent protection of historical buildings.