This study was investigated to compare the volatile aroma compounds of Synurus deltoides and Aster scaber. The volatile aroma compounds from Synurus deltoides and Aster scaber were extracted by soild-phase microextraction (SPME) methods. S. deltoides had 97 volatile aroma compounds such as including 5-acetyl-1,2-dihydro acenaphtylene (14.63%), β-cubebene (9.31%), caryophyllene (8.97%), β-chamigrene (7.14%), β-selinene (2.71), α-farnesene (2.47%), α-bergamotene (2.26%), β-elemene (1.94%), etc. A. scaber had 84 volatile aroma compounds such as (+)-epi-bicyclosesquiphellandrene (10.38%), terpinolen (10.09%), caryophyllene (6.04%), 8-isopropenyl-1,5-dimethyl-1,5-cyclodeca diene (5.42%), α-himachalene (5.04%), β-thujene (4.37%), β-pinene (4.28%), β-cubebene (3.99%), etc. Conclusively, the main common volatile aroma compounds in S. deltoides and A. scaber leaves were 19 volatile aroma compounds such as caryophyllene, terpinolen, β-cubebene. But the composition and amount of volatile aroma compounds were very different between the two species.