The invention relates to a digital control system of a titanium electrode product automatic feeding device of a hydraulic machine and a control method thereof. The system comprises a feeding device, a lift push oil cylinder which is connected with the feeding device, a hopper shutter push air cylinder and a swing oil cylinder. The hopper shutter push air cylinder, the swing oil cylinder and the lift push oil cylinder are connected with an output module of a programmable controller of the hydraulic machine. The digital control system also comprises a displacement sensor, an absolute value typerotary encoder and an induction type proximity switch which are connected with an input module of the programmable controller of the hydraulic machine, The control method comprises the steps: whethera parameter is set on a touch screen is judged; the oil cylinder drives the feeding device to descend; the swing oil cylinder drives a movable arm to rotate; the oil cylinder drives the feeding device to descend; material is fed; the push air cylinder drives and closes a hopper shutter; the oil cylinder drives the feeding device to rise; the swing oil cylinder drives the movable arm to rotate; the oil cylinder drives the feeding device to rise. The digital control system and the control method can automatically monitor the exact positioning for rotating, rising, descending and feeding, ensurethat the feeding work is simple, convenient, fast and exact and avoid stacking.