The invention discloses a die for shaping a U-shaped part. The die comprises a base 1, and the base 1 is rotationally connected with a driving wheel 2 and a driven wheel 3 which mesh with each other.The driving wheel 2 is provided with a first poking claw 4, the driven wheel 3 is provided with a second poking claw 5, and the base 1 is provided with a first air cylinder 6 used for driving the first poking claw 4 to rotate. The base 1 is in sliding connection with a first clamping plate 7 and a second clamping plate 8, wherein the first clamping plate 7 is used for abutting against or breakingaway from the lower end of the first poking claw 4, the second clamping plate 8 is used for abutting against or breaking away from the lower end of the second poking claw 5, and the first clamping plate 7 and the second clamping plate 8 are each of a bent structure. The base 1 is in sliding connection with a positioning block 10 used for positioning the U-shaped part 9, and the first clamping plate 7 and the second clamping plate 8 are located on two sides of the positioning block 10. The die for shaping the U-shaped part can improve the precision of the U-shaped part.