Abstract:Objective: To study the hypoglycemic effect of the total flavonoids in Leucaena seeds(TF). Method: Experimental observation was perfonned by using various diabetic mice induced by alloxan, adrenalin, etc. Result: TF could significantly lower the blood glucose levels in Alloxan model mice, adrenalin model mice and hyperglycemic mice, while had no hypoglycemic effect on the normal mice. Conclusion: The total flavonoids in Leucaena seeds has hypoglycemic effect in diabetic model mice.