In order to provide a cheap and effective heavy metal ion adsorbent,carrot slag has been used to adsorb copper ions in aqueous solution.Results show that copper ion adsorption rate increases when using a smaller size of carrot slag.The adsorption rate for carrot slag can reach 76.35%at-100 mesh.Different quality carrot slag on different initial concentration copper ions adsorption experiments show that:under the same copper ions initial concentration, addition of more carrot slag results in a higher copper ion adsorption rate.At a constant carrot slag amount different concentrations of copper ions adsorption rate all appear a minimum value.When copper ions initial concentration is 10.0mg/L and the amount of carrot slag is 0.5g,3 factors 6 level orthogonal tests shows that;the optimum adsorption conditions for the wastewater pH is 2,the temperature is 40℃and soaking time is 3 hour.20℃and 40℃copper ion adsorption isotherm results show that:carrot slag on copper ions adsorption with single molecule layer absorption dominant,and adsorption isotherm is fit to Langmuir adsorption isotherm.The copper ions Dynamic adsorption curve results show that;second kinetic model can describe the adsorption kinetics of carrot slag.