Abstract:Comparison of the 9th edition of the Keys to Soil Taxonomy with the 8th edition of the Keys to Soil Taxonomy and the 2nd edition of the Soil Taxonomy: A Basic System of Soil Classification for Making and Interpreting Soil Surveys show that some amendments were made including revision of 4 Diagnostic Horizons and 2 Diagnostic Characteristics and addition of 4 Suborders, 12 Great Groups and 42 Subgroups to high levels of classification; 3 Strongly Contrasting Particle-Size Classes to displace one in diagnostic features of soil families and series; and 1 basic genetic horizon and 3 special genetic horizons. Based on the above generalization, some suggestions for Chinese Soil Taxonomy were put forward, such as continuing the research on soil classification to improve its Diagnostic Horizons and Characteristics, and the study on Anthrosols, and strengthening institutional construction, and so on.