Banana peel was made from adsorbent for adsorption of Pb²⁺ from simulated wastewater.The adsorption efficicncy of adsorbent grain size,pH,initial Pb²⁺ concentration,adsorption time and banana peel dosage was investigated. The experiment results showed that the optimum operating conditions were banana peel grain size of 100 meshes, pH of 5.0,Pb²⁺concentration of 50 mg/L , adsorption time of 90 min and banana peel dosage of 0.5g, the adsorption capacity of banana peel reached to 9.16 mg/L, Under these conditions, more than 90%of Pb²⁺ was removed from 100 mL of simulated wastewater at 30℃.