The steel bar bending machine is an improvement on the structure of the steel bar bending machine. The utility model comprises a reducer, a large gear, a small gear and a curved disc surface. The feature lies in that in the structure: the two-stage braking motor is directly connected with the reducer as the first-stage reduction. The pinion meshes with the large gear for two-stage reduction. The large gear always drives the curved disc surface to rotate. The curved disc surface is provided with a central shaft hole and several curved shaft holes. The positioning square bar on the worktable surface is provided with several positioning shaft holes. As the two-stage braking motor is directly connected to the reducer for one-stage reduction, the input and output speed ratio is accurate, the bending speed is stable and accurate, and the speed can be automatically controlled by electrical means to change. The brake can ensure the bending Angle. The steel bars are bent in both directions by the forward and reverse rotation of the motor. The central shaft is replaceable for easy maintenan The steel bar bending machine is an improvement on the structure of the steel bar bending machine. It uses a new type of reducer, large gear, small gear and bending disc surface. The feature lies in that in the structure, the bipolar braking motor is directly connected with the reducer as the first-stage reduction, the small gear and the large gear cooperate for the second-stage reduction, and the large gear always drives the bending disc surface to rotate. The central shaft hole and the bending shaft hole on the bending disc surface Several shaft holes are respectively provided on the positioning square bars of the worktable surface. The steel bars are bent bidirectionally by using the forward and reverse rotation of the motor.