Abstract: The volatile components were determined in bark and needles of Pinus yunnanensis, the host plant of Tomicus minor to explore the selection mechanism of T. minor on host plants and provide references for screening effective attractants of the plant origin and ecological control of T. minor. Extractive distillation combined with gas chromatograph-mass spectrometry (GC-MS) was selected to determine volatile components in needles and bark of P. yunnanensis. The needles contained 35 volatile components from 7 groups,including 24 terpenes, 5 alcohols, 2 ketones, 1 ether, 1 phenol, 1 ester and 1 alkane. The bark contained 34 volatile components from 7 groups,including 22 terpenes, 5 alcohols, 2 ketones, 1 ether, 1 phenol, 1 ester and 2 alkanes.