The invention discloses a 1,4-pentadiene-3-ketone derivative containing benzotriazinone. The 1,4-pentadiene-3-ketone derivative containing benzotriazinone is characterized by having the general formula as shown in the specification, wherein R1 is phenyl, substituted phenyl (p-fluorophenyl, p-chlorophenyl, o-chlorophenyl, 2-methyoxyphenyl, 4-methyoxyphenyl, 4-methylphenyl, 2,4-dimethyoxyphenyl, 3,4-dimethyoxyphenyl, cinnamaldehyde group, 3-nitrophenyl, 2-chloro-5-nitrophenyl and the like), heterocyclic group (furyl, thienyl, 2-pyridyl, 3-pyridyl, 4-pyridyl, pyrryl and the like) or substituted aromatic heterocyclic group (5-methyl thiazole, 5-methyl-2-thienyl, 4-bromo-2-thienyl and the like), and R2 is a hydrogen atom, methyl (ethyl), methoxyl (ethyoxyl) and the like. The compound disclosedby the invention has relatively high inhibiting activity for citrus canker bacteria, ralstonia solanacearum and tobacco mosaic viruses so as to be used for preparing an agricultural bactericide and anantiviral agent.