Abstract: Geomorphological classification is the basis for understanding the natural geographical features of the region. However, due to the influence of geospatial differences, the macro-geomorphological classification standards can not effectively serve the study of physical geography in small areas. Based on the SRTM DEM data with a resolution of 30 m, the altitude and relief of the Tongbai Mountain area were analyzed. The results show that the altitude of the Tongbai Mountain area is approximately 300~800 m, and the relief is about 0~370 m. The study area is mainly dominated by low mountains and hills. By using three swath profiles, it showed that there were three obvious boundaries at the heights of 300 m, 500 m, and 700 m above sea level in the Tongbai Mountain area. In addition, the analysis of the relief based on an analysis with a 15×15 pixel window showed boundaries of 30, 70 and 200 m. Based on the two terrain parameters of altitude and relief, combined with the Chinese geomorphological zoning standards, the geomorphic units of Tongbai Mountain is divided into four major categories and 16 subtypes, namely Ⅰ, Ⅱ, Ⅲ and Ⅵ plains, platforms, hilly areas and mountainous areas.