The heavy metal Pb、Cu、Zn 、Cr content of surface samples and pillar samples in different geography of core sanctuary in XINYANGGANG tidal land were analyzed in this paper. The present pollution condition of heavy metal and heavy metal accumulation rule were studied by Index of geo-accumulation index, latent ecological risk index method and elements accumulation index method. The research suggested that 1、The heavy metal Pb、Cu、Zn 、Cr content trend in XINYANGGANG tidal land is basically the same and this tend do not change between before and after return a turn, but the undulate scope of heavy metal become narrow and The wave crest and trough of wave have a lagged trend. 2、After researching the heavy metal content of surface tidal land, you can find that change of heavy metal Pb、Cu、Zn、Cr are lower one by one in order from high tidal land to low tidal land, but the degree of this change is different. Change of Cu、Ni、Zn content are obvious, at the same time the change of Cr、Pb content are not obvious. 3、The heavy metal Pb、Cr content in XINYANGGANG tidal land express accumulated character, and Pb content of XINYANGGANG is 300% of that of Jiangsu province soil, whose EF is 3.774. All that suggest that XINYANGGANG tidal land have Pb pollution. 4、RI of XINYANGGANG is 23.552, this suggest that though XINYANGGANG tidal land have some heavy metal pollution and accumulation, there are no ecosystem danger, and The whole XINYANGGANG core area environment quality is good.