Reinforcing steel bar bidirectional bending machine

The invention relates to a reinforcing steel bar bidirectional bending machine. Two bending mechanisms are arranged at a reinforcing steel bar bending station on a machine frame; each bending mechanism comprises a base, a bending part, a lower bending press block part and a second reinforcing steel bar lifting device; the bending part comprises a rotating shaft, a bending mandrel, a bending shaft, a main shaft motor and a telescopic cylinder; the rotating shaft slides along the axial direction of the rotating shaft and is rotatably supported on the base; the rotating shaft is provided with anaxis hole; the bending mandrel is inserted into the axis hole and is axially positioned and connected relative to the rotating shaft; the front end of the bending mandrel is extended and is used as abending supporting part; the bending shaft and the bending supporting part of the bending mandrel are parallelly arranged side by side; the bending shaft is fixedly connected with the rotating shaft;the output shaft of the mai