In this paper, the author chooses to analyze the narrative text in combination with the prototypical symbol in the Bimo literature Shanlin Shennüjing of Liangshan Yi nationality, and tries to offer a cultural interpretation. Being different from writer literature and folk literature in the usual sense, Shanlin Shennüjing is a text with strong literary narrative. In the scripture the word 'fir' runs through the whole text, and the fur forest is the place where the goddess grows; it is an image constantly present in the literature and also a primitive image repeatedly present in ethnic experience. So, what makes "fir" an important narrative theme and what it means in Yi people's mind? The answers lie in the narrative of the text.