The invention discloses a method for preventing and treating tobacco virus diseases in the technical field of tobacco disease prevention. The method comprises the following steps of 001, medicament selection, specifically, selecting Jin weiguo No.5, 8% ningnanmycin water aqua and 10% diethyl aminoethyl hexanoate soluble granules; 002, medicament blending, specifically, (1) preparing four stirringrods, a mixing container and three dissolving containers, (2) respectively putting one of three medicaments including the Jin weiguo No.5, the 8% ningnanmycin water aqua and the 10% diethyl aminoethylhexanoate soluble granules into one dissolving container, fully dissolving the medicaments to prepare mother liquor, and (3) sequentially pouring the mother liquor into the mixing container; and 003,pesticide spraying, specifically, containing pesticides into a sprayer, and spraying the pesticides in the morning and evening of sunny weather. Compared with the prior art, the method has the beneficial effects that the three medicaments for inhibiting viruses, promoting growth and supplementing nutrition are mixed for use, the tobacco mosaic virus disease is prevented and treated by combining the three manners, and the pesticides are applied in the morning and evening of a sunny day, so that the prevention and treatment effect of the pesticides is further ensured.