论刘勰诗本体论诗体的规范与进化观

既强调诗体的规范又强调诗体的进化的诗的进化论，是刘勰诗本体论的重要组成部分，刘勰在诗歌的形式本体上的思想是既保守又激进的，他很重视文体，语言，体验和想象，刘勰诗的形式本体论的主要学说是“诗有恒裁”说：强调诗歌有体，诗人应该有自觉的文体意识，甚至认为四言为正体；又不反对诗体进化，主张“随性适分”、“质文代变”。

On the Standard and Evolution of Poetic-style of Chinese Ancient Poetry in Liuxie' Poetry Ontology

The poetic-style evolution idea include the rule and freedom of poetic-style in Chinese ancient poetry is important part of Liuxie' poetry ontology.On the poetic-form ontology,On how to write a poem,Liuxie'poetry idea is conservative and radical.He pays more attention to style?language?experience and imagine in poetry writing.The main idea of Liuxie'poetic-style ontology is potry needs stle standard which poet should obey it.But poet has freedom to change poetic stlye accoding to the evolution of history.