A hydraulic forging press comprising a pressure cylinder group, the pressure cylinder group including: a main pressure cylinder configured to be capable of constantly supplying hydraulic oil during forging; and at least one or more secondary pressure cylinders (22, 23, 24, 25) configured to be capable of switching a supply and a supply stop of the hydraulic oil depending on a forging load, the hydraulic forging press further comprising a cylinder select control device configured to control the supply and the supply stop of the hydraulic oil to the main pressure cylinder and the secondary pressure cylinders (22, 23, 24, 25), head side hydraulic chambers (22h, 23h, 24h, 25h) of the secondary pressure cylinders (22, 23, 24, 25) being connected to a head side hydraulic chamber of the main pressure cylinder through switching valves, respectively, and wherein the head side hydraulic chambers (22h, 23h, 24h, 25h) of the secondary pressure cylinders (22, 23, 24, 25) are further connected to auxiliary accumulators through the switching valves, and the auxiliary accumulators are configured to be capable of supplying the head side hydraulic chambers (22h, 23h, 24h, 25h) with the hydraulic oil when the secondary pressure cylinders (22, 23, 24, 25) are pressurized, the hydraulic forging press being characterized in that the cylinder select control device is configured to control the switching valves such that the main pressure cylinder is solely used until the forging load exceeds a predetermined set load, and the number of secondary pressure cylinders (22, 23, 24, 25) to be used is gradually increased as the forging load increases after the forging load exceeds the set load. a main pressure cylinder configured to be capable of constantly supplying hydraulic oil during forging; and at least one or more secondary pressure cylinders (22, 23, 24, 25) configured to be capable of switching a supply and a supply stop of the hydraulic oil depending on a forging load, the hydraulic forging press further comprising a cylinder select control device configured to control the supply and the supply stop of the hydraulic oil to the main pressure cylinder and the secondary pressure cylinders (22, 23, 24, 25), head side hydraulic chambers (22h, 23h, 24h, 25h) of the secondary pressure cylinders (22, 23, 24, 25) being connected to a head side hydraulic chamber of the main pressure cylinder through switching valves, respectively, and wherein the head side hydraulic chambers (22h, 23h, 24h, 25h) of the secondary pressure cylinders (22, 23, 24, 25) are further connected to auxiliary accumulators through the switching valves, and the auxiliary accumulators are configured to be capable of supplying the head side hydraulic chambers (22h, 23h, 24h, 25h) with the hydraulic oil when the secondary pressure cylinders (22, 23, 24, 25) are pressurized, the hydraulic forging press being characterized in that the cylinder select control device is configured to control the switching valves such that the main pressure cylinder is solely used until the forging load exceeds a predetermined set load, and the number of secondary pressure cylinders (22, 23, 24, 25) to be used is gradually increased as the forging load increases after the forging load exceeds the set load.