Water invasion in carbonate rock gas reservoirs with water can greatly reduce the production. In view of this problem，the surface of carbonate rock was superhydrophobically modified by interface modifier（silane coupling agent）. The influence of interface modification on the percolation ability of water phase，gas phase and gas-liquid two-phase was studied through porous medium flow experiments. The results showed that when the mass fraction of interface modifier was 3%，the contact angle between modified carbonate rock and water was 153°，and then the interface of the carbonate rock reached a superhydrophobic state。Under the condition of superhydrophobic carbonate rock and single-phase constant pressure（0.05—0.40 MPa）injection，the seepage velocity of single water phase was increased by 72.1%—85.9%，and that of single gas phase was increased by 52.9%—72.5%， compared with that before modification（contact angle 0°）. Under the condition of two-phase flow with gas phase constant pressure （0.3 MPa）and water phase constant flow（0.05—0.20 mL/min），the outlet time of sand filling pipe was reduced by 41.0%— 47.4%，and the seepage velocity of gas phase was increased by 102.1%—104.5% . When gas phase and water phase were both two-phase flow with constant pressure（0.07—0.30 MPa），the amount of water phase entering the pores was reduced by 75.6%— 100.0% ，and the seepage velocity of gas phase was increased by 111.1% —200.0% after the interface of carbonate rock was modified to superhydrophobic. By modifying the superhydrophobic interface in the near wellbore zone of gas reservoirs with water， the capillary force of water phase in the pores became resistance. It could effectively prevent formation water from entering the pores of near wellbore zone and reduce the degree of water invasion. At the same time，it could reduce the viscous friction force of gas phase on the pore surface，and then the water phase produced a“slip effect”at the interface，reducing the seepage resistance of gas and water phases，ultimately increasing the production of gas reservoir.