Erbaifangzi (EBFZ) wetland and Fulaowenpao(FLWP) wetland were chosen for study sites, and the diofribution characteristics of total nitrogen and different forms of nitrogen contents in soil profiles were studied in the two sites.The results showed that there existed regional difference for physical properties of soil profiles in the two sites;It was similar for the distribution characteristics of nitrogen contents in two climate periods in close wetland, decreasing gradually from top down;the distribution characteristics of available nitrogen, organic nitrogen and total nitrogen in open wetland were consistent with those in uclose? wetland;However, content of ammonium nitrogen content in soil profiles appeared the changing tendency of' decreasing after increasing, and there was an accumulative peak in soil profile during maturity period in open wetland.