Objective To study the effect and eradication of Kuiyang Decoction（decoction for ulcer） plus triad-therapy of western medicine on helicobacter pylori（Hp） positive duodenal ulcer.Methods The 140 cases were randomly divided into two groups.The control group

70 cases

was treated by standard triad-therapy:omeprazole

amoxicillin and metronidazole per os for one week in succession

then only omeprazole

20mg each time

twice a day

3 weeks in succession.The treatment group

70 cases

was treated by Kuiyang Decoction per os

one dose each day

for 4 weeks in succession in addition to taking the above-mentioned western medicines in the same way as the control group.Before and after treatment both groups were given the Hp test for comparing the therapeutic effect.Results The treatment group was better than the control group in the effect under gastroscope

Hp eradication rate

symptom improvement

and one-year recurrent rate（P<0.05）.Conclusion The combination of Kuiyang Decoction plus triad-therapy of western medicine for the treatment of Hp positive duodenal ulcer is remarkable in improving eradicative rate of Hp.