Submarine cables are the lifelines for power transmission in offshore wind farms. However, the suspended sections of these cables are exposed above the seabed and are prone to damage due to long-term exposure to cyclic ocean loads. This paper establishes a three-dimensional dynamic response analysis model of "monopile foundation - submarine cable-protective pipe-soil" based on ORCAFLEX to study the protection effect of protective pipes under different sea conditions and wave incidence angles. The results show that when the waves and ocean currents enter at 0°, the bending radius of the submarine cable is the smallest, and when they enter at 90°, the tension of the submarine cable is the greatest. The presence of the protective pipe can not only increase the bending radius of the submarine cable, avoid the failure of the bending cable, make the curvature change of the submarine cable more gentle, and improve the bending performance of the submarine cable; but also avoid the direct action of environmental loads on the submarine cable and reduce the internal tension of the submarine cable.