Anthranilic diamide compound containing bishydrazide structure and preparation method and application of anthranilic diamide compound

The invention discloses an anthranilic diamide compound (I) containing a bishydrazide structure and a preparation method and an application of the anthranilic diamide compound. 2-substituted-6-chlorine/bromine-8-methyl-4H-3,1-benzoxazine-4-ketone is taken as a raw material and ring-opening reaction is carried out on the 2-substituted-6-chlorine/bromine-8-methyl-4H-3,1-benzoxazine-4-ketone and hydrazine hydrate in the presence of alkali to obtain an intermediate (II); and acylation reaction is carried out on the intermediate (II) and RCO2H by using an organic alkali N,N-diisopropylethylamin and a coupling reagent O-benzotriazole-N,N,N',N'-tetramethyluronium tetrafluoroborate to obtain a series of anthranilic diamide compounds (I) containing the bishydrazide structure. The compound has an excellent prevention effect on diamond back moth and beet armyworm, can be applied to control of diseases and insect pests of various crops and has the advantages of being efficient, low in toxicity, low in residue, green and