The invention relates to the technical field of insecticides, in particular to an insecticide compound and application and a preparation thereof. The insecticide compound consists of 3-chlorine-N1-(2-methyl-4-heptafluoroisopropylanilina)-N2-(1-methyl-1-cyano ethyl) phthalic diamide and dinotefuran. Compared with a single preparation, the insecticide compound has an obvious synergism effect, can be used for effectively preventing and controlling lepidoptera pests, orthoptera pests or piercing-sucking mouthpart pests; therefore, the amount of used pesticides is reduced and the pesticide application cost is lowered, a wide insecticidal spectrum is wider. The insecticide compound and the preparation method thereof are beneficial to environment protection and comprehensive treatment of agricultural pests.