The essential oil of the whole fruit and the peel of Anli pear (Pyrus Ussriensis Maxim.)grown in the western region of Liaoning Province was extracted through the hydrodistillationmethod, and was investigated by gas chromatography-mass spectrometry (GC-MS) technique.The yields of the essential oils of Anli pear whole fruit and the peel were 0.073 and0.36%, respectively. The identification of the volatile compounds was conducted throughthe commercial National Institute of Science and Technology (NIST) and Wiley massspectral search program, confirmed by comparing the retention indices with standardvalues of authentic samples. A total of 7 and 16 components were identified from theessential oils of the peel and the whole fruit, respectively. The predominant constituentof the two kinds of essential oils was butylated hydroxytoluene, which is a typicalantioxidant. The essential oil of the whole fruit and the peel of Anli pear (Pyrus Ussriensis Maxim.) Grown in the western region of Liaoning Province was extracted through the hydrodistillation method, and was investigated by gas chromatography-mass spectrometry (GC-MS) technique. yields of the essential oils of Anli pear whole fruit and the peel were 0.073 and 0.36%, respectively. The identification of the volatile compounds was conducted through the commercial National Institute of Science and Technology (NIST) and Wiley massspectral search program, confirmed by comparing the retention indices with standard values ​​of authentic samples. A total of 7 and 16 components were identified from theessential oils of the peel and the whole fruit, respectively. The predominant constituent of the two kinds of essential oils was butylated hydroxytoluene, which is a typicalantioxidant.