The utility model discloses a pipeline bending device in the technical field of pipeline bending devices, which comprises a mounting seat, a rotating rod is rotatably arranged on the upper side of the mounting seat, a rotating plate is fixedly sleeved on the outer side of the rotating rod, a connecting rod is fixedly arranged on the upper side of the rotating plate, and a bending head is fixedly arranged at the upper end of the connecting rod. A fixing block is fixedly arranged on the upper side of the mounting base, a first electric push rod is arranged on the outer side of the fixing block, one end of the first electric push rod is connected to the fixing block, a rack is fixedly arranged at the other end of the first electric push rod and meshed with the gear, and a fixing mechanism is arranged on the upper side of the mounting groove. By means of the simple installation structure, a pipeline can be conveniently bent, meanwhile, the bending amplitude can be conveniently adjusted and controlled, therefore, the bending effect of the pipeline is effectively guaranteed, operation of workers is facilitated, the working efficiency is effectively improved, the working intensity is reduced, the practical effect is good, and the pipeline bending device is worthy of being popularized and used in the existing market.