Abstract: The turbidity change characteristics of sodium resinate solution was studied at the existence of calcium ions. The effect of ACS, a kind of heavy metal ion complexing reagent at different temperature, pH, dosage of ACS, and adding order on the solution turbidity was investigated in this paper. It was found that calcium resinate, a hydrophobic and easy aggregating compound was formed by ion exchang between sodium resinate and calcium ion. Formation of calcium resinate could be inhibited effectively by means of absorbing calcium ion in the solution with ACS. And it was useful to adsorbing Ca2+ and decreasing the beginning turbidity by raising temperature and pH. Either ACS was added before or after resinate sodium filling, it had excellent function of transferring Ca2+, and the dosage of ACS needs only half adding in the former.