To identify the cause and process of the food poisoning incident and take effective measures to deal with.Methods The dinners, associated personnel and risk factors were investigated. Samples of suspicious poisoning food were analyzed and identified.Results 11 men were all poisoned by plant medicinal liquor with alcohol consumption ranged from 0.1 to 0.2 kg. The incubation period was 10-20 min, and the attack rate was 100%. Five cases died, and the death rate was 45.46%. Cases without drinking were unaffected. The more alcohol consumption would lead to a shorter incubation period and more serious symptom. The plant steeped in wine was identified as Graceful Jesamine. Conclusion This case of food poisoning was caused by poisonous plant Graceful Jesamine. In order to avoid similar accidents emerging in the future, the local government should put poisonous plant into the food safety education to enhance the consciousness.