Liu Cang, a quite unique poet of the late Tang Dynasty, is almost forgotten in history. He ascended to a high level in terms of the History - Nostalgia Poems, which show the decline of dynasties vicissitudes and in fact mirror the reality of history. With his History - Nostalgia poems full of profound rational enlightenment and sense, Liu warned the ruler to learn lessons from history sarcastically and formed his own unique artistic style, which contributed a different kind of flavor to the Historv- Nostaluia Poems of la~ Tan~, Dynasty