Abstract: Camptolomainterioratais a defoliator damaging Quercustrees with characteristics of bursty and periodicity. Presentation was made on morphology and habit,occurrenceanddamage, disaster reason, and preventioncountermeasures of the pest , the prospect of biological control of this insect was prospected, and a further systematic study on the natural enemy complex was proposed to provide a new idea and method for the control of this pestOur results showed that:the pest mainly distributes in Northeast China, South China, Beijing, Hebei, Henan, Gansu, Shandong, Anhui and Jiangsu provinces, mainly harming Q. mongolica and Q.wutaishanica. It also feeds on Q. acutissima, Q. variabilis, Q. aliena, Castaneamollissima and other trees. The larvae eat the bud of trees in early spring, making the trees unable to germinate normally,after hatching in autumn, the larvae flock to feed on the leaf and residual epidermis of Quercus trees, the occurrence of C. interioratais closely related to the ecological environment. It often occurs in hilly and mountainous areas and generally presents a point block shape. Then, it spreads to the surrounding stands and has close relationship with temperature, site conditions, tree species structure and other factors.The main characteristics of the damage are rapid occurrence, large population density, short harm time, the strains rate in affected stands can be up to 70% ~ 80%, the number of pest populations inindividual tree can also be up to 200 ~ 20,000.The prevention measures include planting mode prevention, physical control, chemical control and biological control.Among them, the planting mode of mixed arbor-shrubs and mixed broadleaf-conifer are carried out on forestry measures. By using the characteristics of the formation of insect bracts live in groups over the winter, the method of picking up the insect bracts by hand could be usedin physical control and set up black light and frequency vibration lamp to kill the adult pest.