随着5G商用越来越近，其对本地传送承载网络提出了更高要求，基于SPN技术的移动承载网络部署成为解决问题的重要手段。介绍了4G业务本地传送网的主要承载技术及组网结构，以及现有传输承载网承载5G所面对的困难，提出了面向5G的本地传送网的改造和建设方案的应用策略，并给出了山东某市SPN网络部署案例。

With the development of 5G business, higher requirements are put forward for local transport and bearing network. The deployment of mobile bearing network based on SPN technology becomes an important means to solve the problem. This paper introduces the main bearing technology and network structure of 4G service local transmission network, as well as the difficulties faced by the existing transmission bearing network for carrying service of 5G, puts forward the application strategy of the transformation and construction scheme of 5G-oriented local transmission network, and gives a case of SPN network deployment in a city of Shandong Province.