Preparation method and application of fluorine-containing alkyl sulfonyl benzimidazole compound

The invention discloses a fluorine-containing alkyl sulfonyl benzimidazole compound or a salt thereof and application of the fluorine-containing alkyl sulfonyl benzimidazole compound or the salt thereof in pesticides, and belongs to the field of pesticide insect killing and mite killing. The technical problem to be solved by the invention is to provide a novel compound which can be used as an insecticide, especially an acaricide, in pesticides. The structural general formula of the compound is as shown in a formula I in the specification. The fluorine-containing alkyl sulfonyl benzimidazole compound is novel in structure, simple to synthesize, cheap in raw material, wide in raw material source and excellent in insecticidal performance, especially acaricidal performance, and especially when two or more fluorine-containing alkyl sulfonyl benzimidazole compounds are matched for use, the fluorine-containing alkyl sulfonyl benzimidazole compound can also have efficient insecticidal and acaricidal effects even unde