The Study in lab revealed the relationship between efficiency of the compound of fixed active sullage and green algae in fresh water adsobed Pb²⁺ and main influence elements.The effect showed that the compound was better to its simplex component settled figure on adso rption effect,in compound adso rption prog ress,time and original water's pH,temperature,concent ration and embeding content of compound were biggish to adsorption effect.Adsorption ef ficiency was 97.5%and adso rption capcity was 48.75mg/g.When Pb²⁺ concentration in original water was 500mg/L,embeding content was 0.20g and pH was 5,tempereture was 27.5℃ and adsorption time was 1h,reborn deso rptionreagent was HNO₃ and its rebi rth ability was better.