Abstract: The author surveyed the the damage and species of longicorn occurred on plum trees,compared their host preference to Furong plum, Dahong plum and black plum.The result showed that the plum trees were easly to subjected to the adults and larvae, contained 14 species of 11genera.The main species of longicorn to caused damage to the three kinds of plum trees were Anoplophora chinensis, Aromia bungii and Apriona germari. For the host preference to the tree kinds of plum trees, black plum was the strongest, Furong plum was the second and the Dahong plum was the weakest.