Abstract: The mood elements "jiu jie le" independent of the true meaning of a sentence, it marks the subjective attitude of the speaker and the communicative intention of the speakers. From the subjectivity of mood elements "jiu jie le", it mainly manifested in the subjective recognition of the suggestion and the affirmation and reemphasis of the subjective comments in the unaccomplished events, the subjectivity of its interaction is realized mainly through the combination of "jiu jie le" and "bu", "ma". The mood elements "jiu jie le" it was roughly formed in the period of the late Qing Dynasty, and in the process of grammaticalization, there is a certain retention of its lexical meaning, as a mood marker, it has the function of the mood mark, but its grammaticalization process has not been finished yet.