The composite materials adsorbed bromine ions in water were prepared.A certain amount of silver nitrate was added to polyethersulfone to make the casting solution,and AgCl-PES composite membranes were prepared by in-situ synthesis method.The structure of composite membrane materials were analyzed and studied by specific surface area measurement（BET）,scanning electron microscopy（SEM）,X-ray powder diffraction（XRD） and tensile property test.The effect of silver chloride content,adsorption time,adsorption temperature,initial pH of solution on removal of bromine ions was investigated through static adsorption method.Experimental results showed that the optimized condition for adsorption of bromine ions by the composite membrane were m（AgCl）/m（PES）=0.10,adsorption time of 7 h,adsorption temperature of 25 ℃,initial pH of solution of 9.The adsorption process of bromine ions on the composite membrane was accorded with the Langmuir linear adsorption isotherm and Pseudo-second-order kinetic models at 25 ℃.The maximum theoretical adsorption capacity of the composite membrane was 83.31 mg/g with m（AgCl）/m（PES） of 0.10.