Objective: Studied the adsorption characteristics of magnetic chitosan modified kaolin on caffeic acid in simulated sugarcane juice, and provided the reference for the removal of phenolic pigments in sugarcane juice. Methods: Magnetic chitosan modified kaolin was prepared by coprecipitation of chitosan, nano ferric oxide and kaolin. The surface structure and group changes of kaolin before and after modification were characterized by FT-IR, VSM and SEM; The adsorption characteristics of caffeic acid were studied by adsorption test. Results: the modified chitosan and nano-Fe₃O₄ were successfully loaded on kaolin, and the adsorption performance of caffeic acid was improved. The isoelectric point of magnetic chitosan modified kaolin was 4.54, and the acid condition was conducive to the removal of caffeic acid, and the adsorption equilibrium was reached at 240 min. The adsorption process of caffeic acid on magnetic chitosan modified kaolin was more consistent with the pseudo second order kinetics and Langmuir isotherm adsorption model. The adsorption process was mainly chemical adsorption and monolayer adsorption. The thermodynamic study showed that the adsorption process was spontaneous endothermic process. Conclusion: Magnetic chitosan modified kaolin exhibited strong adsorption capacity for caffeic acid in sugarcane juice, and can be used as sugar clarifier for the adsorption of caffeic acid in sugarcane juice.