In this paper, γ-Al2O3 was used as the carrier to screen the active ingredients. As the result, Ti and Sn were used to prepared the supported γ-Al2O3 Particle. IR, XRD, SEM, and XRD were used to characterize the particle electrode. The effect of electrolysis time on the three-dimensional particle electrode electro-catalytic oxidation of chloramphenicol was studied The chloramphenicol removal rate and TOC removal rate were 72.8% and 4.2% obtained at 100 mg/L chloramphenicol and 180 min, respectively. The degradation process of chloramphenicol was approximate first-order kinetics equation, and the initial concentration had less effect on the removal. ·OH played a key role in particle electrodes electro-catalytic oxidation process of chloramphenicol. Adding t-butanol to clean ·OH, the removal of chloramphenicol was reduced to about 30% under the same conditions. This indicated that the degradation of the chloramphenicol was coordinated effect of directed oxidation of anode and indirected oxidation of ·OH.