In modern poetry, a symbol does not precisely point to a clear object. It must be set through the context and atmosphere of sentences to bring readers closer to the author's thinking. This research takes 'closed-reading' to analyze the text. Through Yang Chia-Hsien's poems, we refreshed four aspects of modern poetry-musical, graphical, structural and ideological expressions. The study attempted to clarify how poets utilize the symbol and how it works in modern poetry. Taking Yang Chia-Hsien's poems as example, it was found that situation, object, sensation and action have high frequency of poetic use.