The poetry and rhyme are the organic component of the novel Out Laws of the Marsh in our acceptable psychology.This passage is based on Mr Sun zhu-zhong' s thesis Art Fouctions in the Poetry and Rhyme on Out Laws of the Marsh,published by Jiangxi Social Sience,and makes some supplement to its ideas.The poetry and rhyme in Out Laws of the Marsh has the functions of dipicting figures,auxiliary narratives,exaggerating scenes,psychological portraits,preaching,advising,correcting,and entertainment.