Abstract: “Ti Zhi” is the core concept of Yan Yu's poetic theory,but due to unperceived separation and confusion,its exact connotation and true colors have not been fully presented,which also hinders the overall understanding of Yan Yu's poetic theory system and poetic ideas.By combining text refinement and logical induction,it can be seen that the concept of “Ti Zhi” in Cang Lang Shi Hua points to the complete and specific ontological existence of poetic works,and this basic connotation does not differ due to the differentiation and analysis of poetry genres from different perspectives in “Shi Ti”.The “Ti Zhi” of poetry not only includes basic elements such as “ci”,“li”,“yi” and “xing”,but also uses “Xing Qu”,“Ge Li”,“Qi Xiang”,“Yin Jie”,etc.to fully express the inherent quality and artistic power of poetry.Among them,“Ge Li” is based on the meaning of poetry,and represents the spiritual power expressed by the general thought and emotion in the poetry;“Xing Qu” is based on poetic sentiment,and it is the natural and implicit sentiment and interest expressed in the poetry;“Qi Xiang” is based on the poetic image,and it is the natural and vigorous image presented by the poetry;“Yin Jie” is based on the poetic language,and it is a full rhythmic and ideographic artistic language.A more practical and contextual understanding of the conceptual relationship and overall structure of Cang Lang Shi Hua can be acquired focusing on the penetrating view of “Ti Zhi” in poetry.

Key words: Cang Lang Shi Hua, “Ti Zhi”, “Xing Qu”, “Ge Li”, “Qi Xiang”, the theory of body and function, penetrating