Gestational diabetes mellitus can eat a moderate amount of Emperor Citrus, its glycemic index is low, but it is not recommended to eat more. Emperor citrus contains a lot of dietary fiber, citric acid, vitamin C and calcium and other nutrients, can enhance human resistance, and the glycemic index is low, so gestational diabetes can eat emperor citrus, will not cause significant fluctuations in blood glucose, and will not affect the health of pregnant women and the fetus. If a large number of Emperor Citrus or consumed on an empty stomach, indigestion, abdominal pain, diarrhea and other conditions are likely to occur. Therefore, it should be consumed in moderation and is recommended to be eaten between meals. Patients with gestational diabetes mellitus are advised to eat sensibly, seek timely medical treatment and have regular review.