In the three-dimensional(3D)design of channels,the traditional 3D modeling software is not suitable for the 3D modeling of channel due to the long length of the channel line,wide coverage,and diverse cross-sectional forms,as well as the lining,slope protection,intercepting ditches,and maintenance roads of the channel cross-section.The OpenRoads Designer software can quickly and conveniently achieve 3D modeling of various channels.Moreover,using 3D channel models can achieve functions such as engineering quantity statistics,cross-section mapping,and real scene modeling,effectively solve the problem of wide coverage,large site,and inability to establish 3D models in water diversion projects.This provides effective technical support for the construction of water diversion and transmission lines in water conservancy projects.The detailed introduction of channel 3D design through OpenRoads Designer software was introduced in detail based on a certain channel construction project,in order to provide reference for similar engineering projects in channel 3D design in the future.