In order to explore the influence of the coupling effect of different wave and flow environments on the dynamic response of the net system, the effects of wave-current direction, current velocity, wave height and period, and ten different net damage forms on the tension and deformation of the net under the coupling action of regular waves and currents are analyzed based on the lumped-mass method and the equivalent mesh method. The results show that: under the coupling action of regular waves and currents, the connection position between the net and the rigid frame and the middle part of the net experience the maximal force; the deformation at the four corners of the net is minimal, and the tension of the net increases with the increase of current velocity and wave height; under different net damage forms, the tension of the net significantly decreases only in the direction of net damage, while the tension in other directions does not show significant changes; regarding node movement, only the motion of nodes around the damage area of the net increases, while the motion of other nodes does not show significant changes.