Sheet bending machining die

The utility model discloses a sheet material bending processing die, which belongs to the technical field of die equipment, and comprises an upper die and a lower die which can be assembled with each other, the lower die comprises a retainer plate, a movable stamping part and a die core; the retainer plate can move back and forth in the punching direction; the movable stamping part is arranged on one side of the retainer plate; the mold core is arranged on the other side of the retainer plate; the upper die can drive the movable stamping part to reciprocate in the width direction of the retainer plate. In the process that the upper die drives the retainer plate to move in the stamping direction and drives the movable stamping part to move towards the retainer plate, all bent parts can be stamped on the sheet stock at a time under the pressing action of the upper die, the die core and the movable stamping part, and pressure maintaining operation can be conducted on the stamped sheet stock. Therefore, a plurali