Abstract:10 streptozotocin-induced diabetic rats were treated with baicalin 150mg/kg·d and liquid extract of licorlce(LEL) 7.5ml/kg·d (5 by each medicine) for a week. The results indicated that orally baicaliu and LEL could dramatically reduce the sorbitol levels in red blood cells(123.7±28.6 to 72.5±21.8 and 116.9±25.2 to 80.5±23.8nmol/g·Hb, respectively) without affecting blood glucose levels significantly. It is suggested that both medicines act by inhibiting aldose reductase.