The invention discloses a method for controlling Rhbdophaga salics Schrank. The method comprises the following steps: (1) in early April in the Salix integra growth process, spraying a 0.21 wt% sodium carbonate solution at 6a.m. to 7a.m. every day, spraying a reagent a at 12 at noon to 1p.m. every day, and performing uniform illumination under artificial lighting for 1 hour/day for 3 continuous days, wherein the reagent a and water are blended in a mass ratio of 1:(20-30) and then sprayed, and the intensity of illumination is 520-560lux; and (2) in early May in the Salix integra growth process, spraying a 0.56 wt% sodium carbonate solution at 6a.m. to 7a.m. every day, spraying a reagent b at 12 at noon to 1p.m. every day, and performing uniform illumination under artificial lighting for 1 hour/day for 3 continuous days, wherein the reagent b and water are blended in a mass ratio of 1:(35-40) and then sprayed, and the intensity of illumination is 550-600lux. The steps for treatment in the method have obvious control effects on Rhopalomyia californica.