Positioning device for pipe bender

The utility model discloses a positioning device for a pipe bending machine. Relating to the field of positioning devices, bearing plate, a mounting plate is arranged above the bearing plate; clampingblocks are arranged at the corners of the mounting plate, clamping grooves are formed in the middles of the clamping blocks, connecting rods are fixedly connected to the bottom ends of the clamping blocks, mounting grooves are formed in the four corners of the bearing plate, each mounting groove is composed of a plurality of mounting holes, the mounting holes are formed in the bearing plate in arectangular array mode, and the bottoms of the connecting rods penetrate through the mounting holes to be sleeved with sleeves in a threaded mode. According to the utility model, the mounting plate and the connecting rod are arranged in a matched manner; the positions of the connecting rods are limited through the mounting holes; the sleeves and the clamping blocks fix the positions of the connecting rods in the inner cavi