Automatic discharging device of bending machine

The utility model relates to an automatic discharging device of a bending machine. The automatic discharging device comprises a fixing frame, a rotating air cylinder, a telescopic rotating rod and a discharging channel. The fixing frame is detachably connected with the bending machine, the rotating air cylinder is connected with the upper end of the fixing frame through the supporting seat, the angle of the supporting seat is adjustable, the telescopic rotating rod is connected with a piston rod of the rotating air cylinder, a knocking block is arranged at the end, away from the rotating air cylinder, of the telescopic rotating rod, and the discharging channel is connected with the fixing frame. And the discharging channel corresponds to the position of the telescopic rotating rod. According to the automatic discharging device of the bending machine, the sheet metal part subjected to bending operation on the bottom die of the bending machine can be knocked and discharged, the discharged material of the sheet