Thomas poetry shows anti-pastoral elements in Welsh rural areas as the near-despair landscape the machine in the garden and the law of jungle.By reflecting his nationalist complex,anti-modern and ecologist stand in such a realistic way of anti-pastoral representation,Thomas conveys his interventionist sentiment and moral import esthetically and ethically by discussing the meaning of idyllic and anti-idyllic and analyzing the anti-idyllic writing in Thomas'poetry and its realistic concern.