Abstract: Using summer-wood branches,leaves and stem of Ailanthus alitissima to feed the beetle(Anoplophora glabripennis) as well as the stem of Populus simonii Carr.treated with the extract of Ailanthus alitissima,the effects of Ailanthus altissima and its extract on feeding and oviposition of the beetle were studied.Forcing feed of the summer-wood branches,and leaves,the death ratio of the beetle was more than 80%.Feeding choice experiment results showed that the beetle did not feed and oviposit on the branches and leaves of the tree of heaven.Compared with the control group,the beetle’s mating frequencies,quantity of eating flute and eating area were all the control group’s 5% each other.The result also showed that there was not significant effect on the feeding and mating of the water extracts,but it had the inhibit function on oviposition and egg hatching,and the egg production of tested group accounted for 35% of the control group’s.The settling frequencies,mating frequencies and egg production of the tested group which was treated with the aether extract of forcing feed experiment were control group’s 4.5 times,11.3 times and 5 times respectively.But settling frequencies,mating frequencies and egg production of the tested group of feeding choice experiment were accounted for 27.7%,7.5%,7.5% of the control group’s each other.Therefore,there were significant inhibit effects of the aether extract on feeding,mating,ovipositon and egg hatching of the beetle.