Objective:To explore the application value of ADC value in oxidative stress injury of the liver in a rat model of Budd-Chiari syndrome.Methods:135 experimental SD rats were randomly divided into a control group(15 rats,routine clean feeding),model group(60 rats,ligation of the posterior segment of the inferior vena cava)and sham-operation group(60 rats,no ligation of the inferior vena cava).The model group and sham-operation group were divided into four subgroups(1-,4-,8-,12-week group,15 rats in each subgroup).The changes of ADC values in the liver at different time points were observed.HE staining of the liver in each group was observed,and the changes in malonaldehyde(MDA)and superoxide dismutase(SOD)were detected.Results:The ADC value of the model group showed a trend of decreasing first and then increasing(the lowest in the fourth week),which was always lower than that of the control group and the sham-operation group,the overall difference was statistically significant(all P<0.05).After operation,the MDA value of the model group first increased and then decreased and was always higher than that of the control group and the sham-operation group,while the SOD value first decreased and then increased and was always lower than that of the control group and the sham-operation group(all P<0.05).The ADC value of the model group was negatively correlated with MDA value and positively correlated with SOD value,and SOD value was negatively correlated with MDA value(all P<0.05).Conclusions:The ADC value has a certain correlation with oxidative stress injury in Budd-Chiari syndrome after hepatic congestion and hypoxia,and it can be used as a new method to dynamically evaluate hypoxic injury in Budd-Chiari syndrome.