The invention relates to an insecticidal composition in the field of combination of pesticides. Effective components of the insecticidal composition comprise novaluron and fenpropathrin, wherein the weight ratio of novaluron to fenpropathrin is (1 to 80) to (80 to 1), preferably (1 to 50) to (50 to 1); the total percentage by mass of the effective components in the insecticidal composition is 1%-90%, preferably 5%-60%; the rest components of the insecticidal composition are auxiliary components which are allowed to be used and are accepted in pesticides; a known method is capable of preparingthe insecticidal composition into wettable powder, dispersible oil suspensions, suspension emulsions, water suspensions, missible oil, water emulsions, micro emulsions or water dispersible granules. The insecticidal composition is mainly used for prevention and treatment of insect pests on tea trees and insect pests on vegetables and the like.