本文采用水蒸气蒸馏提出挥发油，并利用不同类型的毛细管柱，找出最佳色谱分离条件，再利用气相色谱－质谱－计算机系统将色谱分离出的３５种成分进行鉴定，从中定性了２１种成分，占总挥发油成分的６０％。从ＧＣ－ＭＳ鉴定结果看，天然野生蔓荆子比种植药用蔓荆子缺少了氯代甲烷、二氯甲烷、氯仿和１－甲氧基－４－（２－丙烯基）苯，因此，两者在挥发油成分上极为相似，有进一步研究开发利用的价值。 In this paper, the volatile oil was extracted by steam distillation, and different types of capillary columns were used to find the optimal conditions for chromatographic separation. Then 35 components identified by chromatographic separation were identified by gas chromatography-mass spectrometry-computer system, and 21 components were identified from them. It accounts for 60% of total volatile oils. From the results of GC-MS identification, natural wild vitex was inferior to the planted medicinal Vitex chlorinated methane, methylene chloride, chloroform and 1-methoxy-4-(2-propenyl)benzene, therefore, Both are very similar in the composition of volatile oils, and have further value for research, development and utilization.