ObjectiveTo investigate the effect of early enteral nutrition (EEN) support in the perioperative period of children with perforated appendicitis based on the enhanced recovery after surgery (ERAS). MethodsThe children with perforated appendicitis were collected as an observation group, who underwent EEN support treatment based on the ERAS mode from January 2021 to December 2022 in the Xuzhou Children’s Hospital. At the same time, the children with perforated appendicitis received conventional nutrition support from January 2019 to December 2020 were matched as a control group according to the principle of balanced and comparable baseline data such as the gender, age, disease course, pathological type, and body mass index with the observation group. The time of first exhaust or defecation and the hospital stay after surgery were compared. Meanwhile, the nutritional indexes [prealbumin (PA), albumin (ALB), hemoglobin (Hb)], immune indexes [immunoglobulin (Ig) A, IgM, IgG], serum inflammatory factors [C-reactive protein (CRP), interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α)] before surgery, on day 1 and 7 after surgery were compared. And the adverse effects were observed. ResultsThere were 40 children with perforated appendicitis in the observation group and the control group, respectively. There were no statistical differences in the baseline data such as the gender, age, course of disease, pathological type, and body mass index between the two groups (P>0.05). The time of first exhaust or defecation and the hospital stay after surgery in the observation group were shorter than in the control group (t=3.234, P=0.002; t=5.582, P<0.001). The levels of PA, ALB, Hb, IgA, IgM, and IgG in the observation group were higher than in the control group on day 7 after surgery (P<0.05). The levels of CRP, IL-6, and TNF-α in the observation group were lower than in the control group on day 7 after surgery (P<0.05）. The incidence of adverse reactions in the observation group was lower than that in the control group [5.0% (2/40) vs. 22.5% (9/40), χ2=5.165, P=0.023]. ConclusionsFrom on the results of this study, EEN support based on ERAS during perioperative period of children with perforated appendicitis contributes to recover gastrointestinal function, correct nutritional status, improve immune function, and reduce inflammation, and which has a higher safety for children with perforated appendicitis.