Using 10 μm Fe-Si-B amorphous composite powder and 300 mesh iron powder as the reaction material for removing heavy metal ions from water, the removal ability of heavy metal ions from water was compared and studied. The results show that the removal efficiency of 500 mg/L Cu(II) by 0.5 g/L Fe-Si-B amorphous composite powder is more than 98% within 20 min. The reaction rate coefficient kobs of Fe-Si-B amorphous composite powder is 0.236 min-1 , 300 mesh iron powder is 0.087 min-1 , and the removal rate is much higher than that of iron powder, and the removal process conforms to the pseudo-first-order kinetic model.