Abstract: The larva of Anoplophora nobilis is the most destructive stem borer of poplar. Different degree of resistance can be observed in various poplar species. Experimental results have indicated that resistance is related to the quantity of soluble sugars and phenlic compounds contained in the tree. The resistance to the pest is sufficiently high with a lower proportion of soluble sugars and tannic acid. It is worth noting that the eating habit of the pest will be altered by the presence or absence of gallic acid. The results provide theoretical basis for selecting poplar trees with a strong resistance to A. nobilis.