Abstract: There have been various interpretations of Katydid Part of ZHOU Nan, such as those of praising the tolerance of king's concubine and satirizing the cruel exploiting system of rulers. In addition, we can find the interpretation of the songs hoping people to get more children in present edition The Book of Songs. It is not difficult to see that all these interpretations are derived from the phenomenon that a katydid has numerous children. From the subject analysis of Katydid Part of ZHOU Nan, we can see the influence of current thoughts on the interpretations of classic works.