With element analyzer, this paper measured the variation of organic carbon and total nitrogen in different soil depths of reed wetland. The results showed that soil organic carbon, total nitrogen, and C/N ratio were decreased gradually with increasing soil depth, and their accumulation peaks were differed with soil layers and months. Soil temperature and moisture and the growth status of reed were the main factors caused the differences. Soil organic carbon was strongly positively correlated with soil total nitrogen content in July, August and October, the R2 being 0.73, 0.73 and 0.71 respectively, but weakly correlated in September. Soil C/N ratio was negatively correlated to soil organic carbon and total nitrogen, but the correlativity was higher with soil total nitrogen than with soil organic carbon, suggesting that soil C/N ratio was more determined by the content of soil total nitrogen.