Abstract: The starch derivatives DSX was synthesized by graft copolymerization and sulphonation of cross-linking starch and acrylamide with the center of Nitrogen.And its structure was analyzed by the Infrared spectra.An investigation on simulated heavy metal wastewater with 20 mg/L of Cu²⁺，Pb²⁺，Zn²⁺，Cd²⁺ was studied by using the starch derivatives DXS.It was showed that the average removal rates of Cu²⁺，Pb²⁺，Zn²⁺， Cd²⁺ were 99.5%，99.4%，99.0% and 99.2% respectively at temperature of 20 ℃, pH 7, DXS of 1.5 g/L for 20 minutes.

Key words: Starch derivatives DSX, Heavy metal wastewater, Removal