In order to rationally protect and explore the wild poisonous plant resources in the Namjagbarwa region， the distribution of families and genera， the composition of life forms， the toxicity， poisonous parts and toxicological effects of plants were analyzed by field investigation， specimen investigation and related literature books inspection. The results showed that there were 77 families， 167 genera and 242 species of wild poisonous plants in the Namjagbarwa region， among which the dominant families mainly included Araceae， Ranunculaceae， Ericaceae， Fabaceae and Asteraceae respectively. The most poisonous plants with herbaceous life form were 138 species in total. Most of the plant toxic parts were poisonous whole grass， a total of 109 species. There were 184 species with mild poisonous plants， including 50 minor toxic plants， there were only five kinds of highly poisonous and three kinds of strong poisonous. There were 19 poisonous nectar source plants， Scrophulariaceae and Ranunculaceae were dominant； in terms of toxicology， most of them were nervous system poisoning. There were many kinds of poisonous plant resources in the Namjagbarwa region， but there was less use of these resources. It was necessary to strengthen the understanding and protection of poisonous plants， and carry out rational development and explroation.