The invention discloses arctium lappa ferment. Arctium lappa mainly serves as a raw material, and the arctium lappa ferment is prepared through the steps of fresh arctium lappa storing, cleaning and peeling, selecting, slicing and color protecting, freezing, defreezing, steeping, brown sugar water preparing, fermentation preparing, fermentation process implementing and fermentation completing. The arctium lappa ferment has the effect of common ferment and various effects of relaxing the bowels, inducing diuresis, moistening the lungs, eliminating phlegm, stopping cough, removing beverage, reducing blood pressure, resisting ageing and radiation, effectively preventing strokes and the like, and the application field of arctium lappa foods is effectively broadened.