To identify the source and risk factors of the food poisoning event.Methods A epidemiology survey was carried out according policy. Results 8 of 9 people developed patient (88.89%). The main symptoms of the poisoning are nausea, frequent vomiting, dizzy and stomachache. The breakfast on 16^th May was doubtful. The wild vegetable was doutful poisonous food.Conclusion This food poisoning event was caused by hellebore. The authors have put forwards their points and suggestions.