Digital production line modeling, simulation and optimization technology is to use the object-oriented simulation modeling method to establish a manufacturing system model in a virtual manufacturing environment. The simulation technology is used to analyze and evaluate the operating performance of the manufacturing system to solve complex problems in the modern manufacturing process. Provide the ideal method.The key technology for building a digital factory is the construction of a three-dimensional scene of the whole factory, and information integration and system integration based on this, to realize the visualization of the factory environment, the combination of virtual and real simulation applications, and the management of factory workshop information. The 3D scanning technology can be used to quickly and completely obtain the 3D factory data. Combined with the InfiPoints one-stop platform, it can process massive factory point cloud data and realize the conversion to a solid model and the application of factory digitization.