The invention discloses an automatic clamping bending mold in the technical field of bending molds, which includes a backing plate for a lower bending mold, a pressure block for an upper mold, a positioning device, and an automatic clamping device. The automatic clamping device includes a support frame, a servo motor, Gear box, rotating rod, clamping mechanism, main support mechanism, the support frame is fixedly connected to the ground, a servo motor is arranged behind the top left side of the support frame, the output shaft of the servo motor is connected to the reducer box, and a rotating shaft is arranged behind the top surface of the support frame, and the rotating shaft The axis is at the same level as the center line of the top surface of the backing plate of the lower die. This invention mainly solves the problem of the rapid development of China's manufacturing industry in recent years, which is a huge market for bending dies, but the bending efficiency of current bending dies is low. And it is very unsafe to manually hold the plate for bending, especially when the plate is large, manual bending will also cause the bending position of the bent plate to deviate, which cannot guarantee the bending effect well.