I. Introduction
With the development of the size of network, there are greater challenges and issues with the broadband network. Network flexibility needs to be improved and needs to be able to support a variety of new services and technologies flexibly, reduce the complexity and cost of network oper-ations and maintenance, improve the quality of operations and maintenance. When introducing new services and tech-nologies, such as deployment, optimization and adjustment directly on the physical network, there are problems of complexity, high cost and slow adjustment. In response to these problems, the digital twin network was created, which is a virtual network formed by mapping the physical network. This virtual network allows for quality monitoring of the existing network, evaluation of network adjustment options, assess the effectiveness of the deployment of new technologies and services, and interacts with the physical network in real time.