介绍了工程中实施区域阴极保护的必要性，工程应用中的难点和如何根据阴极保护区域实际情况，采用合理的设计和施工技术，以获得保护电流的均匀分布，同时避免或限制其干扰和屏蔽的影响。阴极保护系统作为一个集设计、施工、运营等一体的复杂系统性工程，数值模拟计算已经在其优化设计中有了许多应用，并显示出相比于传统方法的巨大优势。因此，在阴极保护技术发展中，研究人员在注重设计本身的同时，需兼顾站址选择、管线施工及运行管理等因素，还应加强应用数值模拟计算方法来指导区域阴极保护设计。

This paper introduces the necessity for the implementation of regional cathodic protection and the difficulty in the engineering application, according to the actual circumstance of cathodic protection area, how to adopt rational design and construction technology, so as to obtain a uniform distribution of protection current, and to avoid or limit the impact of the interference and shielding by the protection current. Cathodic protection is a complex systemic engineering integrated by design, construction and operation. Numerical simulation, which is applied a lot to the optimal design of cathodic protection system, displays a huge advantage compared to traditional methods. So, in the development of cathodic protection technology, not only should be the design itself emphasized, but also other elements such as siting of station, pipeline construction and operation management should be also taken into account. Besides, numerical simulation should be also applied further to guide the regional cathodic protection design.