Objective To investigate the diagnostic value of shear wave elastography（SWE） in early postoperative cholangitis in children with biliary atresia.Methods Fifty-nine children who were diagnosed with biliary atresia in our hospital and confirmed by operation were analyzed.In addition

1 month after operation infants were divided into cholangitis group（n=23）and non-cholangitis group（n=36） according to whether cholangitis occurred

the preoperative and one-month postoperative changes of liver mean Young’s modulus（Emean） in the two groups of SWE were measured and compared.Results There was a statistically significant difference of preoperative and postoperative liver Emean values between the non-cholangitis group and the cholangitis group respectively（both P<0.05）.When the comparison of preoperative liver Emean was not statistically significantin between the cholangitis group and non-cholangitis group.The liver Emean of cholangitis group was significantly higher than that of the non-cholangitis group after operation in 1 month [（18.42±7.74） kPa vs.（12.68±4.99） kPa]

there was significant difference（t=-3.477

P=0.001）.The preoperative liver Emean values of all infants showed a linear relationship with the age（r=0.258

P=0.000）.However

there was no significant linear correlation between the age and the liver Emean after operation in 1 month.Conclusion SWE technique has certain value in the detection of liver stiffness in infants with biliary atresia in early cholangitis.