Polyaniline (PANI) modified activated carbon (AC) particle electrode was prepared by in-situ polymerization method. The morphology and crystal structure of the particle electrode were studied by metalloscope, X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). And the composition was analyzed and applied to the photocatalytic degradation experiment of FBL; the factors such as compound amount, particle electrode dosage, current density, pH and initial concentration were examined for the degradation of FBL influences and studies on photocatalytic degradation kinetics of FBL. The results show that photocatalysis and electrocatalysis produce a synergistic effect; when the concentration of electrolyte Na2SO4 solution is 0.03mol?L-1, the particle electrode dosage is 9 g?L-1, the current density is 8 mA?cm-2, and the pH is 3, the removal rate of FBL with a concentration of 20 mg?L-1 reached 95.47%.