[Objective] To study the adsorption properties of methylene blue by using economic and environmental magnetic peanut shell activated carbon as adsorbent.[Method]The optimum conditions of adsorption were determined by investigating the amount of adsorbent,the time of adsorp-tion,the initial concentration of dye,the pH and temperature of the solution.[Result]The optimum adsorbent dosage was 0.4 g/L,and the adsorp-tion process was not affected by the pH of the solution.This process was basically consistent with the quasi two order kinetic model (R2 >0.988). The agreement between the adsorption isotherm and the Langmuir isotherm equation was the highest (R2 >0.986).[Conclusion]The magnetic peanut shell activated carbon was an attractive substance for removing dyes from dye wastewater.