The invention discloses a punching structure of a forging hydraulic press, and relates to the technical field of the hydraulic press. The punching structure is characterized by comprising at least a hydraulic press sliding block (1), a horizontal telescopic locking oil cylinder (2), a vertical telescopic material punching oil cylinder (3), a punching head (5) placed on an anvil block of the hydraulic press, a locking wedge iron (4) mounted on the locking oil cylinder (2) and a material punching plate (6) for separating a workpiece; the material punching plate (6) is arranged at the lower end of a piston rod of the material punching oil cylinder (3); a shell of the locking oil cylinder (2) is fixedly connected with the hydraulic press sliding block (1); the shell of the material punching oil cylinder (3) is fixedly connected with the hydraulic press sliding block (1). The punching structure of the forging hydraulic press is used for installing the corresponding punch head on the sliding block of the hydraulic press by using the quick-change punching structure. The forging hydraulic press is used for forging punching and setting punching frame to separate punched forge pieces and the punching head when loop pieces are specially forged by the forging hydraulic press, and the aim of punching the forge pieces is achieved.