A new kind of anthranilic diamides containing 5, 7-dimethyl [1, 2, 4] triazolo [1, 5-a] pyrimidine were designed and synthesised. Their structures were identified by means of elemental analysis, IR, 1H NMR and MS spectra. As thekey intermediate, ethyl 5, 7-dimethyl [1, 2, 4] triazolo [1, 5-a] pyrimidine-2-carboxylate (7) was synthesised by applying microwave irradiation.