In order to screen out the volatiles with attractive activity to adults of Bactrocera tau（Walker）. The olfactory responses of adult Bactrocera tau（Walker） to four host volatiles（heptadecane, n-hexadecane, octadecene and cis-3-hexene-1-ol） were measured by y-olfactometer. The results showed that the four host volatiles had trapping effect on the adult of Bactrocera tau（Walker）. The highest attractive rates of heptadecane on Bactrocera tau（Walker） adult males were 78.76% and 82.82%. The highest attractive rates of n-hexadecane to Bactrocera tau（Walker） male and female adults were 84.52% and 86.84%, and the highest attractive rates of octadecene to Bactrocera tau（Walker） female and male adults were 84.46% and 81.89%. The highest attracting rates of cis-3-hexen-1-ol to Bactrocera tau（Walker） male and female adults were 84.52% and 86.84%. The results show that heptadecane,n-hexadecane, octadecene, and cis-3-hexen-1-ol can be used as ingredients of Bactrocera tau（Walker） adult plant attractants.