The oxidation of 3-picoline to nicotinic acid took place efficiently in an ethanol solution with O2 as the oxidant under the catalysis of T(o-C1)PPMn at 40-150℃ and 0.5-3.0 MPa oxygen pressure.The influences of temperature,oxygen pressure,reaction time,concentration of 3-picoline,concentration of sodium hydroxide,and concentration of T(0-C1)PPMn catalyst,etc.on the production of nicotinic acid were investigated.The results show that T(0-C1)PPMn presented excellent catalytic activity in the oxidation of 3-picoline to nicotinic acid and the yield of nicotinic acid varied greatly with the reaction temperature,oxygen pressure,T(0-C1)PPMn concentration,etc.