In order to compare different methods (impedance spectroscopy, Single-frequency method and DC-method) of electrical conductivity measurement of rocks under high pressure and high temperature, We have measured the electrical conductivity of lherzolite collected from Damaping at pressure of 1.0GPa, temperatures of 500～900℃ and 2.0GPa, 500～950℃ with above three methods at the same time in YJ-3000t cubic-anvil apparatus. The experimental results indicate that in the range of experimental temperatures and pressures, the electrical conductivity of lherzolite changes between 8.65×10-7Sm-1 and 2.09×10-3Sm-1, lnσ and 1/T could be well fitted by Arrhenius relationship. The values of pre-exponential factor change between 1.36 Sm-1 and 37.89 Sm-1 and the activation energy values between 0.74～1.01eV. The electrical conductivity of lherzolite shows strong positive dependence of temperature, but little dependence of pressure. The comparison of results of the three methods shows that impedance spectroscopy is the highest one and the DC-method’s is lowest one, but the discrepancy of lnσ among them is negligible（＜3%）. At the final part of this paper, we also compared our experimental results with data derived from magnetotelluric measurements. The electrical conductivities of lherzolite extrapolated to corresponding depth could account for the conductivity structure of upper mantle beneath this area. Then, we also could confirm that lherzolite is the predominant constituent of the upper mantle rocks in northern margin of the North China Craton.