In the field of communication network equipment, the development trend of high-speed systems has put forward higher requirements on the electrical properties of PCB materials. At the same time, in order to improve the price competitiveness of electronic products, more factors must be considered in terms of material cost control. How to choose materials that meet both electrical performance and price competitiveness has become a common concern of PCB designers in the field of communication networks. Fanwei is a high-quality PCB manufacturer in China, providing various PCBs of different materials, professionally selecting suitable materials to meet the requirements of high electrical performance and low cost. This article mainly discusses the steps and methods of PCB material selection, including Dk/Df testing and identification, mixed application of copper foil roughness, signal integrity simulation and testing. In addition, in the material selection process, the price comparison between materials of different levels and the material comparison between materials of the same level are analyzed to reduce PCB costs.