Abstract: Experiments were conducted to investigate the problems of severe nutrient loss of traditional alfalfa hay processing methods and storage difficulties in moist or rainy conditions. Alfalfa hay was treated with different processing methods, non-processing was taken as Control (CK). Bale treatments were sampled before storage and at 0, 30, 60, 90 and 120 days post baling. Nutrient content and the curve of nutrient change during 60 days storage were analyzed to study the effect of compound additives on the nutrient quality of alfalfa hay baled under high-moisture content.