Abstract: Based on the model of VOF（Volume of Fluid） and UDS（User Defined Scalar）, this paper builds the simulation model of using conductivity probe measuring two-phase flow parameters. The process of using double-sensor probe measuring two phase flow was simulated. The electric field distribution was obtained when the probe pierced the bubbles. The results show that the probe piercing the bubbles cause the distinct change of the distribution of current and voltage. As the process of simulation is not influenced by noise signal, bubble shape variation and signal response delay, the ideal signal is obtained such as the square wave signal of current and voltage. The simulation results truly reflect the basic process of the measurement by using the double-sensor probe for gas liquid two-phase flow.