Abstract��In order to study the adsorptive capability of oyster shell powder adsorbing low concentration heavy metal ions in water, five kinds of heavy metal ions Cu2+,Zn2+,Pb2+,Cd2+,Cr(��)has been added in the water, the influence of adding different amount, adsorption temperature, pH value, adsorption time and initial concentration of solution has been discussed. And it also carried out dynamics research, thermodynamic study and SEM analysis. Results showed that Cu2+,Zn2+,Pb2+ has a good removal capacity, but Cd2+��Cr(��) is relatively weak. The adsorption by oyster shell powder is in line with the secondary kinetic equation and the Langmuir isotherm model. The SEM maps indicated that secondary solid was built on the oyster shell powder surface after adsorbing Cu2+,Zn2+,Pb2+ and no obvious phenomena on the surface after adsorbing Cd2+,Cr(��).