Abstract:Objective To summarize the best evidence for dietary management of gestational diabetes mellitus (GDM) and provide evidence-based evidence for clinical practice. Methods Evidence-based methods were used to search the American Diabetes Association (ADA) website, UpToDate, Wanfang, CNKI and other Chinese and English databases, and all the evidence on GDM diet management was summarized. The search period was from the establishment of the database to April 2021. Results 15 articles were finally included, including 7 guidelines, 4 systematic reviews, 1 recommended practice, 1 evidence summary, 1 expert consensus, and 1 clinical randomized controlled trial. The best evidence included diet assessment, dietary guidance, choice of nutritional supplements, and health guidance. There were 16 best evidences in total, including the nutritional assessment of pregnant women, the distribution of three major nutrients, and pre-pregnancy BMI recommends daily intake, supplementation of nutrients, and following the same intake of minerals and vitamins as non-diabetic women, allowing GDM patients to acquire dietary knowledge, and build good health after delivery. Conclusion The summary of the existing evidence of GDM diet management can help clinical nurses formulate relevant nursing plans according to the actual clinical situation, so as to optimize the pregnancy outcome of GDM pregnant women.