Forging furnace capable of automatically controlling forge piece heating time

The invention relates to the field of forge piece heating and forging, in particular to a forging furnace capable of automatically controlling forge piece heating time. The forging furnace comprises a lifting device, a feeding device, a heating device and a discharging device, wherein the feeding device comprises a guide plate and a hydraulic cylinder; the guide plate is located between the lifting device and the heating device; one side, far away from the lifting device, of the guide plate inclines towards the ground and is provided with a baffle; a hydraulic cylinder is arranged above the guide plate; a pulse controller is arranged on the side face of the guide plate; round steel rolls on the guide plate after the round steel is conveyed to the guide plate through the lifting device and stops rolling to the baffle; the hydraulic cylinder can push the round steel into the heating device; the pulse controller can send out a pulse signal; and the pulse signal has periodicity, when the pulse signal controls the