In order to improve the mechanical properties of the protective layer of steel pipe pile at the splash zone in offshore wind farm， a graphene photosensitive composite reinforced fiber high performance resin composite tape was designed as the intermediate layer of the protective layer. Based on the damage theory and considering the effects of impact load and temperature load， a numerical model was established to study the mechanical properties of the protective layer. The mechanical properties of the middle layer using graphene photosensitive composite reinforced fiber high performance resin composite tape were compared with those of the middle layer using epoxy fiber reinforced plastics . The results show that under the same impact load， the critical load of damage of graphene photosensitive composite reinforced fiber high performance resin composite tape is 1.5 times higher than that of epoxy fiber reinforced plastics. While at the same temperature， the shear stress on the lower surface of the middle layer using graphene photosensitive composite reinforced fiber high performance resin composite tape is 1/10 lower than that on the lower surface of the middle layer using epoxy fiber reinforced plastics.