Eighty-one volatiles in cucumber flowers, including alcohols, aldehydes and esters, etc. which clustering to 16 groups, were identified using headspace solid phase microextraction(HS-SPME) and gas chromatography-mass spectrometry(GC-MS). The main components were leaf alcohol, linalool oxide, hexanal and decyl acetate. The effects of gradient dilutions of 11 volatiles on the behavior of Frankliniella occidentalis were determined by y-olfactometer. Frankliniella occidentalis had positive preference to benzaldehyde(10-105), 1-octen-3-ol(10-105), myrcene(102), 1-penten-3-ol(102,105), linalool(10, 103, 104), decyl acetate(10, 102, 104), leaf alcohol(10, 103, 105), isovaleraldehyde(10, 104, 105) and isoamyl alcohol(102); and had repellent reaction to myrcene(10, 104,105), benzyl alcohol(10), phenylacetaldehyde(102,104), 1-penten-3-ol(10), linalool(105) and decyl acetate(103).