Wild celery is also called whitehead, poisonous ginseng, celery leaf hookah, spotted poisonous celery. The main toxic components are parsley alkaloids, methyl parsley alkaloids and parsley toxins. The role of poisonous celery alkali is similar to arrow poison, can paralyze motor nerves, inhibit the medullary center. The amount of human poisoning is 30~60 mg, and the lethal amount is 120~150 mg; heating and drying can reduce the toxicity of parsley. Parsley toxin mainly makes the central nervous system excited.