The invention discloses a method of improving Lipaphis erysimi breeding efficiency by using salicylic acid. Through discovery, breeding Lipaphis erysimi by adopting specific temperature and humidity and spraying salicylic acid solution has the following advantages: 1, individuals of Lipaphis erysimi three-year-old nymphs and adults are respectively bigger than those of nymphs and adults in the same age in the prior art; 2, the survival rate of Lipaphis erysimi adults is increased, and the time that the Lipaphis erysimi develops from an egg to the adult is shortened; 3, the life of Lipaphis erysimi female adults produced by breeding is longer than that of Lipaphis erysimi female adults bred in a conventional way, and after a next generation of Lipaphis erysimi is bred by Lipaphis erysimi adults obtained by breeding, the egg laying amount of females is higher than that of the Lipaphis erysimi female adults bred in the conventional way.