The invention discloses indole compounds and an application thereof in control of agricultural fungal diseases and belongs to the technical field of chemical agriculture. The compounds are mainly usedfor control of the fungal diseases and can effectively control fungal diseases of plants, such as banded sclerotial blight, bakanae diseases, bipolaris oryzae, gummy stem blight, wilt, botrytis cinereal, target leaf spot, alternaria alternata and the like. An agricultural fungal disease bactericide prepared from the compounds as an active ingredient has the characteristics of good control effect,wide spectrum, low toxicity, no residues, no pollution and no harm and is particularly beneficial to environment protection. Therefore, some bactericides can be prepared from the compounds to protectagriculture from invasion by fungal diseases.