In this paper, the adsorption properties of micro-pore molecular sieves for Cu~(2+), Zn~(2+), Pb~(2+) and Cd~(2+) have been studied. Experiments show that under the condition of wide pH range, molecular sieves of 10 g/dm~3 and heavy metals ions of 60 mg/dm~3, the adsorption rates of MCM-41/ZSM-3 for Cu~(2+), Zn~(2+), Pb~(2+) and Cd~(2+) are higher than 90%. The regression equation indicates that the adsorption of Cu~(2+), Zn~(2+), Pb~(2+) and Cd~(2+) in the experimental concentration range is coincident with the single site Langmuir sorption and has remarkable adsorption capacity.