A field experiment was carried out to study effects of waste-CaCO₃ on growth and heavy metals (Cd，Pb，Zn，Cu) concentration of a low-accumulating cultivar of Zea mays in a soil contaminated by waste water from a lead/zinc mining，and changes in soil pH and available heavy metals content as affected by application of waste-CaCO₃. Results show that waste-CaCO₃ increased yield of the plant significantly.The effect was the most significant in treatments of high waste-CaCO₃ application rate，where the first crop increased its yield by 154% and the second by 275% as compared with the control，and lowered their uptake of heavy metals (Cd，Pb，Zn，Cu).As a result，their concentrations in the grains were below the criteria of the Natural Food Hygiene Standard. waste-CaCO₃，regardless of its application rate，increased soil pH and reduced the concentration of available heavy metals in the soil to a varying extent，and inhibited translocation of Cd and Cu from stem to grains of the plant，resulting in lower heavy metal concentration in the grains of Z.mays.