The invention relates to an insecticidal composition granule containing triflumezopyrim. The insecticidal composition granule comprises the following components in parts by weight: a phase A component: 70-95 parts by weight of a granule carrier; a phase B component: 1-30 parts by weight of mother powder of a pesticide active component, wherein the pesticide active component is a composition of two components, one is triflumezopyrim, and the other is one of dinotefuran, imidacloprid, thiamethoxam, clothianidin, buprofezin and pymetrozine; and a phase C component: 1-30 parts by weight of functional slurry. The triflumezopyrim-containing insecticidal composition granule has two pesticide active components, and has a remarkable synergistic effect on prevention and treatment of rice planthoppers. The granules are scattered into soil and absorbed by roots, so that plants form strains, and the purpose of preventing and controlling the rice planthoppers is achieved when the rice planthoppers suck the plants. In addition, seaweed-soybean protein is adopted as a carrier, wherein seaweed residues contain seaweed polysaccharides, transport enzymes can be activated in the drug uptake and conduction process, and intake and conduction of drugs are assisted.