The zoning of environmental noise function is aimed to provide a good acoustic environment for people. With the acceleration of China’s urbanization, the zoning of environmental noise function has been widely conducted across the country, and many first-and second-tier cities have even made multiple adjustments on the original zoning. In addition, some third-and fourth-tier cities have also gradually implemented the zoning of environmental noise function. The method for determining the type-2 function area in the “Technical Specifications for Regionalizing Environmental Noise Function” (GB/T 15190-2014) is too general. In this paper, the classification of the type-2 area in different situations was discussed, so as to provide a certain reference for the zoning and adjustment of the environmental noise function areas in various places.