The invention discloses a method for increasing VGM (virginiamycin) yield by adding lanthanum chloride. According to the method, lanthanum chloride is added to a fermentation medium to increase VGM yield. After streptomyces virginiae is cultured in a spore medium, a certain amount of the streptomyces virginiae is scraped, a seed medium is inoculated with the scraped streptomyces virginiae, the streptomyces virginiae is cultured for a period of time, and then the fermentation medium is inoculated with the streptomyces virginiae for fermentation culture. Lanthanum chloride is added during fermentation culture, and experiments prove that the yield of VGM produced from the streptomyces virginiae by fermenting can be increased obviously, and the operation is simple.