The invention discloses a pipe bending device for an air conditioner refrigeration copper pipe. The pipe bending device comprises a base, a driving device, a pipe bending device body and a positioningdevice, the base is fixedly connected with a vertical column, the vertical column is fixedly connected with a large disc, the large disc is fixedly connected with a small disc, the small disc is fixedly connected with a positioning pin, the positioning pin is connected with a fixed wheel in a sleeved mode, the pipe bending device body comprises a rotating disc, the rotating disc rotates by a specified angle through the driving device, the rotating disc is fixedly connected with a connecting rod, the connecting rod is fixedly connected with an arc-shaped block, the arc-shaped block is fixedlyconnected with a distance-fixed rod, and an adjusting block is placed on the distance-fixed rod and provided with a movable wheel. The pipe bending device is concise in structure and small in occupiedspace, the length that the movable wheel rotates around the fixed wheel can be adjusted by replacing the fixed wheels with the different diameters, thus the pipe bending device adapts to the demandsof different pipe bending lengths, the copper pipe can be bent to the set length at a time, angle adjusting for multiple times of pipe bending is reduced, the fixed wheels are conveniently replaced and adjusted, the time and labor are saved, and the production efficiency of bent pipes is high.