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%), ${eta}$-cubebene (9.31%), caryophyllene (8.97%), ${eta}$-chamigrene (7.14%), ${eta}$-selinene (2.71), ${alpha}$-farnesene (2.47%), ${alpha}$-bergamotene (2.26%), ${eta}$-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%), ${alpha}$-himachalene (5.04%), ${eta}$-thujene (4.37%), ${eta}$-pinene (4.28%), ${eta}$-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, ${eta}$-cubebene. But the composition and amount of volatile aroma compounds were very different between the two species.