Abstract: This paper aims to solve the problem of the rapid segmentation and updating of the BIM model of double-curved arch dam in the construction stage, analyzes the advantages and disadvantages of the current modeling methods of the main BIM modeling software of double-curved arch dam. Through the practice of BIM modeling of Baihetan double curvature arch dam, based on "Revit + Dynamo", the BIM model of double curvature arch dam can be created, the BIM model of arch dam can be quickly and automatically segmented, and the corresponding codes and properties can be written parametrically, It greatly improves the output and update efficiency of BIM model after partial deepening, and provides a reliable BIM model for the simulation analysis of arch dam construction and the application of intelligent construction platform.