Abstract:The study observed the protective effect of fermented black onion polysaccharide on the livers and kidneys of type 2 diabetic SD rats.An experimental model was established by intraperitoneal injection of alloxan，and the rats were treated with the same amount of normal saline as the blank control.The rats were continuously administered crude black onion polysaccharide solution for four weeks，and the blood glucose and biochemical index changes were studied during the intragastric administration.Results showed that after four weeks'gavage of black onion crude polysaccharide，the biochemical indexes returned to normal，and the blood glucose decreased significantly，indicating that the liver function was restored.These results showed that black onion polysaccharide could lower blood glucose and blood lipid levels and had a protective effect on the livers and kidneys of type 2 diabetic SD rats.