Abstract: In this research,comprehensive phytochemical profile and antioxidant activities of volatile oil isolated from different varieties of Chimonanthus praecox were studied.The chemical composition of volatile oil was analyzed using gas chromatography-mass spectrometry(GC-MS) method,and visualization of classification in different varieties was carried out based on multiple pattern recognition methods.A total of 62 compounds were identified and 22 main markers responsible for discrimination among different varieties were indicated.In addition,the comparison among new and traditional varieties was achieved and (-)-β-caryophyllene was filtered for its higher content in new variety than traditional ones.The antioxidant assays revealed that Chimonanthus Praecox volatile oil was a good candidate for natural antioxidants.Moreover,the one of new variety had the significantly higher antioxidant activities than the traditional ones in various systems,indicating its high cultivation value.