Abstract: In this thesis,a series of oxidation experiments on galena are conducted under different condition such as pH is 2,temperature is 50℃ and 25℃. The concentration of Pb(Ⅱ)is determined by atom absorb spectrometer (AAS).After the experiment is completed,the solution is isolated from the residual ore samples and the concentration of Fe(Ⅲ)is assayed by EDTA volumetric method.The rate constant,reaction order,reaction reaction rate and energy of activation are also analyzed and computed.The effects of temperature and oxidized medium on lead ore oxidation speed were studied. Under the condition of 50℃ and 25℃, The rate of oxidation reaction is increase when concentration is different.But the effct is better when concentration is 600 mg/l at 25℃,and the oxidation reaction is slow with the formation of the Fe(OH)₃ at 50℃.