Objective:To observe clinical effect of treating severe acute pancreatitis with modified Dachengqi Tang.Method :Thirty-six cases patients with severe acute pancreatitis were randomly divided into two groups.The control group was treated with conventional medical treatment

and the treatment group was treated with modified Dachengqi Tang based on the control group.The clinical effect

related parameters and adverse reaction were observed for control group and treatment group.Result:The total effective rate of the treatment group and the control group was 88.9% and 66.7% respectively

the clinical effect in the treatment group was significantly higher than that of the control group（P < 0.05）.Combined with control group

serum /uric amylase and reactive protein decreased significantly（P < 0.01 或 P < 0.05） after treatment.serum /uric amylase and reactive protein decreased significantly before treatment in this group

especially in the treatment group.There was a significant difference（P < 0.01）.The time for body temperature returned to normal

abdominal pain relief

serum /uric amylase returned to normal and leukocyte returned to normal have significant differences（P < 0.05）.All the times were shorter for the treatment group.Adverse reaction in the treatment group was lower than that of the control group.Conclusion:The modified Dachengqi Tang for treatment of severe acute pancreatitis is better than conventional medical treatment.