Abstract: Volatile compounds of Herb of Style Pachysandra were extracted by solid phase micro extraction (SPME) and were analyzed and identified though gas chromatography-mass spectrometry (GC-MS). The pharmacological effects and the photochemical reaction of volatile compounds were investigated. 104 plant volatile constituents of Herb of Style Pachysandra were identified through computer retrieval. There were 40 kinds of plant volatile components in root of Herb of Style Pachysandra, 50 kinds of plant volatile components in stem of Herb of Style Pachysandra and 60 kinds of plant volatile components in leaf of Herb of Style. Plant volatile components of root, stem and leaf of Herb of Style Pachysandra had 42.91%、71.11% and 92.22%, respectively. Root, stem and leaf of Herb of Style Pachysandra had 13 kinds of same volatile components. The main ingredients were Methyl salicylate (17.04), (S)-4-methyl -3-Ethyl-1-Pentanol (7.29%), alpha.-Ionone (3.72%), 14-Methyl-Pentadecanoic acid methyl ester(2.90%), alpha-Farnesene (2.39%) and so on.