Abstract: Regarding the essential scenery materials as the standard of the first classifying grade-kind. We get Trees Bonsai(Penjing), Trees and Stones Bonsai, Mountains and Rocks Bonsai and Other Bon- sai. The standard of the second type is based on the trunk shape or the scenery type,and it can be di- vided into seven types. Then according to the trunk shape or trunk position or branch position or peak quantity,etc, the standard of the third type can be divided into different styles. And all Bonsai are di- vided into five groups in accordance with the sizes or heights of the pots, trees or rocks.