Objective To observe the effects of Wu-Yao,Da-Huang combination on severe acute pancreatitis gut barrier protection,and on the clinical treatment of severe acute pancreatitis.Methods In the past 10 months,45 casea of severe pancreatitis those treated in our department were randomly divided into 3 groups.group A:on the basis of conventional treatment of inhibiting trypsin secretion and anti-infection,50%magnesium sulfate 50 mL were insected via stomach tube,twice a day;group B:on the basis of conventional treatment,Da-Huang decoction 100 mL high retention enema,twice a day;group C:on the basis of conventional treatment were given by Wu-Yao decoction 50 mL.as well as 100 mL Da-Huang decoction enema,twice a day.Three groups were observed the release of abdominal distension,abdominal(bladder pressure measurement),ACAPHE-Ⅱ score,indicators of neutrophils(N),C-reactive protein(CRP),and the blood levels of D-lactic acid in 1,3,5,7,9 days etc.Results The abdomenal circumference,abdominal pressure,APACHE-Ⅱ score,N and other indicators of the three groups after treatment had the significantly different(P<0.05),with group C the most significant decrease,while no significant difference in CRP.Endotoxin content in three groups was significantly different(P<0.05),and each diminished with time(P<0.05).Conclusion Wu-Yao,Da-Huang combination on gut barrier dysfunction in severe acute pancreatitis showed synergistic protective effect.