This research mainly focuses on the determination of the volatile components in different parts of Atractylodes macrocephala Koidz. and carries out qualitative and quantitative analysis,which can help the changing trend pursue the main volatile components.The volatile components in A. macrocephala samples were determined by headspace solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS).The volatile components were identified by comparing standard samples,the NIST database,and literature.The peak area normalization method determined and compared each component's relative contents.A total of 70 components were preliminarily identified in A. macrocephala.In this paper,the composition and content differences of the main volatile components were obtained through the determination,qualitative and quantitative analysis of the volatile components in the main root,fibrous root,stem,and leaf of A. macrocephala. 27 volatile components were identified from the main root,and atractylodes (37.79%) was the main constituent.A total of 35 volatile components were identified in the fibrous root,mainly atractylon (25.85%),β-sesquiphene (11.68%),and valentene (9.47%),and so on.A total of 32 volatile components were identified in the stem,the contents of β-sesquifolene (12.09%) and atractylon (11.54%) were relatively high,and 45 species were identified in leaves.The main components were caryophyllene D (18.74%),D-limonene (12.89%),atractylon(5.98%),and so on.Based on the analysis of the volatile components in different parts of A. macrocephala,it was found that A. macrocephala has a high content in the non-medicinal parts of A. macrocephala,and the volatile components in the leaves of A. macrocephala are rich,and terpenes are the main volatile components.It has potential high development and utilization value in medicine,food,agriculture,and other fields.This experiment laid a foundation for comprehensively utilizing volatile components in different parts of A. macrocephala.

"> Atractylodes macrocephala Koidz., different parts, volatile components, headspace solid-phase microextraction, gas chromatography-mass spectrometry, comprehensive utilization