Abstract: The volatile components in the cassia twig and honey cassia twig were analyzed by headspace solid-phase micro-extraction （HS-SPME） and gas chromatography-mass spectrometry （GC-MS） techniques. The relative hundred of each component was calculated by area normalization method. The results show that 42 peaks were detected from the raw materials of cassia twig, and 27 components were identified, accounting for 75.53% of the volatile components,the highest content was cinnamaldehyde（42.28%）; 46 peaks were detected from the honey twig, and 31 components were identified, accounting for 86.93% of the volatile components, of which the highest content was cinnamon aldehyde （61.65%）. The total amount of volatile components in honey cassia twig had been increased. The composition and content of the volatile components of the cassia twig were changed,It is more suitable to use honey cassia twig in clinical treatment of deficiency cold pain.

Key words: cassia twig, honey cassia twig, HS-SPME, GC-MS, volatile components.