This paper presents electrochemical oxidation of phenol compound on home-made Ti/Sb2O3-SnO2/PbO2 anodic electrode. Investigation of influence of pH solution on this process was studied. It is indicated that the efficiency of phenol oxidation strongly depends on electrolyte environment. Efficiencies of oxidation processes were evaluated by measurement of chemical oxygen demand (COD). Data showed that in basic enviroment with pH = 8, COD value of initial solution 7.5 g/l Na2SO4 containing phenol 500 mg/l equals to 38.81 percent after 30 minutes of electrolysis on studied Ti/Sb2O3-SnO2/PbO2 electrode. At the same time, with the presence of sodium chloride at 1 percent in this solution, the COD indicator of phenol oxidation reached 96.89 percent after 6 hours of electrolysis.