The utility model discloses an implantable large-diameter rock-socketed single-pile grouting system which comprises a steel casing, a steel pipe pile and a grouting pipeline, the steel casing is arranged in a soil layer in a driving mode, and the steel pipe pile is arranged on the inner side of the steel casing and implanted into a rock stratum; a rock-socketed section grouting annular space is formed between the steel pipe pile and the rock stratum, and a secondary grouting annular space is formed between the steel casing and the soil layer; and a bottom sealing concrete layer is arranged atthe bottom of the steel pipe pile. The underwater grouting quality of the rock-socketed section can be guaranteed, the construction efficiency is high, the grouting quality is good, and the grouting construction cost is saved.