There is no fruit that absolutely cannot be eaten in diabetes, but it is not recommended that diabetics consume fruits with a high glycemic index such as watermelon, cantaloupe, pineapple honey, etc., which are prone to large fluctuations in blood sugar. 1. Diabetics are prone to blood sugar fluctuations. Food glycemic index is an important reference index, usually defined as glucose glycemic index of 100, the glycemic index of food is greater than 70 for high glycemic index food, which has a greater impact on blood glucose. Foods with glycemic index below 55 are considered low glycemic index foods, which have a relatively small effect on blood glucose. 2. The glycemic index of watermelon, cantaloupe and polenta is higher than 70, and the glycemic index of pineapple and mangosteen is around 60. Consumption of these fruits has a greater impact on blood glucose, which can cause large fluctuations in blood glucose in the short term, and is not recommended to be consumed by diabetic patients. Cherries, plums, grapefruit, pomegranates and other fruits have a glycemic index of about 20 or less, and are recommended for diabetics. 3. diabetic patients in the case of good blood glucose control can eat some moderate glycemic index of lower fruits, while it is recommended to be placed in the middle of the two meals, to avoid fluctuations in blood glucose; glycemic index of fruits is not diabetic patients contraindicated fruits, but is not recommended to eat, to prevent blood glucose rise significantly, is not conducive to the control of the disease.