Objective To study the clinical value of enhanced recovery after surgery (ERAS) in the perioperative treatment of type Ⅰ (Todami,1975) biliary dilatation (BD) of children.Methods To retrospectively analyze the data of children with type Ⅰ BD who were treated in the General Surgery Department of Zhengzhou Children's Hospital from June 2014 to May 2018.A total of twenty children with type Ⅰ BD treated with ERAS and 20 children treated with the traditional method in our department were selected in this study using the random number table method.Postoperative indicators (including operation time,first defecation time,changes in amylase in blood and abdominal cavity exudates,length of hospital stay,and hospitalization fee) and relevant postoperative complications (including sore throat,nausea and vomiting,urethral pain,upper respiratory tract infection,incision wound infection,adhesive intestinal obstruction,anastomotic leakage and pancreatic fistula) of the ERAS group and the control group were compared.Results The first defecation time,length of hospital stay and hospitalization fee were significantly lower in the ERAS group than the control group (all P ＜ 0.05) [first defecation time (1.98 ± 0.25) d vs.(2.25 ± 0.31) d;length of hospital stay (6.91 ± 1.25) d vs.(9.95 ± 1.53) d;hospitalization fee (23.32 ± 2.25)thousand yuan vs.(25.99 ±3.10) thousand yuan].Moreover,the incidences of sore throat,nausea and vomiting,urethral pain and upper respiratory tract infection were significantly lower in the ERAS group than the control group (all P ＜ 0.05) [the incidences of sore throat (5.0％ vs.45.0％);the incidences of sickness and vomiting (5.0％ vs.30.0％);the incidences of urethral pain (5.0％ vs.45.0％);the incidences of upper respiratory tract infection (5.0％ vs.40.0％)].On the other hand,there were no significant differences in the mean operation times,changes in amylase levels in the blood or abdominal cavity exudates,incision wound infection,and incidences of adhesive intestinal obstruction,anastomotic leakage and pancreatic fistula (all P ＞ 0.05).Conclusions ERAS for type Ⅰ BD surgery was safe and reliable in children.It effectively promoted recovery of postoperative gastrointestinal function and reduced the incidence of complications.