Abstract: Gas-liquid two-phase flow in horizontal porous pipe is different from gas-liquid two-phase flow in ordinary pipe, which includes wall inflow. Based on theory and experiment researches, a new correlation of wall friction factor for porous pipe flow with inflow is developed. In homogeneous equilibrium model, gas-liquid two-phase mixture is taken as homogeneous fluid. Therefore, the homogeneous equilibrium model for gas-liquid two-phase flow in horizontal porous pipe is the same as the model for single flow with mass transfer, only the flow parameters in homogeneous equilibrium model are taken as average values of two-phase mixture's homogeneous flow parameters. And the new correlation for mixture viscosity of gas- liquid two-phase fluid is developed. By experiment research, homogeneous equilibrium model for gas-liquid two-phase flow with mass transfer is validated. Its calculation accuracy meets the requirement of practical projects.