Objective To observe the effect of different concentration sodium bicarbonate gastric lavage on newborn with swallow syndrome.Methods 88 patients from our hospital were enrolled in this study.They were randomly divided into control group (A group) and experimental groups(B、C、D、E group) according to numerical table.Separately using water and 1.0%, 1.5%, 2.0%, 2.5% sodium bicarbonate solution gastric lavage.Vomiting, abdominal distention, gastric retention and weight changes was observed.Results The result showed that the vomiting, abdominal distention, gastric retention of patients in experimental group were better than that of patients in control group, and there were significant differences between them(p<0.05).but there were no significant difference among the experimental groups (p>0.05).And there were no significant difference among experimental and control groups in weight changes(p>0.05).Conclusion 1%sodium bicarbonate can much shorten the time to stop vomit and reduce complication.Therefore it is highly recommended and popularized.