Objective To discuss the influence of hydrotherapy on jaundice of newborn. Methods We divided 400 newborn into the hydrotherapy group and the control group with 200 cases in each group randomly. The newborn in the hydrotherapy group received hydrotherapy from 24 hours to 30 days after born,one time per day and 15 minutes per time.The control group was given pure shower, the time of first defecation ,the time of meconinm turning yellow, jaundice index and incidence of hyperbilirubinemia were compared at the 1st,5th,10th and 30th days after born. Results The time of first defecation and the time of meconium turning yellow were advancer in the observation group than those in the control group(P<0.01 ).The jaundice index at the 5th,10th andf 30th days after born and the incidence of hyperbilirubinemia also decreased in the observation group compared with those of the control group (P<0.01 ). Conclusion Hydrotherapy could decrease the jaundice of newborn and prevent the incidence of kernicterus.