The invention provides a radial rotary forging precision forging process and a radial rotary forging device for a shaft part blind hole. The radial rotary forging device includes a core rod, a core rod operating machine, to-be-processed rods, a GFM rotary forging precision forging machine, and a driving clamping head; the GFM rotary forging precision forging machine comprises a left upper hammer head, a left lower hammer head, a right upper hammer head and a right lower hammer head, and the to-be-processed rods are placed between the left upper hammer head, the left lower hammer head, the right upper hammer head and the right lower hammer head; and one end of each to-be-processed rod is clamped on the driving clamping head, the other end of each to-be-processed rod is propped against the core rod, and the end, propped against on the core rod, of each to-be-processed rod is the to-be-processed blind hole end. Compared with a traditional processing technology, the radial rotary forging precision forging process and a radial rotary forging device have the following advantages that (1) materials are saved, processing hours are shortened, the materials are saved, the efficiency is improved, and the manufacturing efficiency is an urgent need for wartime military supply; and (2) the forging performance is high, and compared with an original processing technology, the strength of a shell is greatly improved.