Circumferential fixing device for PP pipe machining

The utility model belongs to the technical field of PP pipe fixing, and discloses a circumferential fixing device for PP pipe processing, which comprises a workbench and a workpiece, the top of the workbench is fixedly provided with a base, the top of the base is fixedly provided with a lower contact block, the left and right sides of the top of the base are fixedly provided with fixing frames, and the left and right sides of the top of the base are fixedly provided with upper contact blocks. A hydraulic rod is fixedly installed at the top of the fixing frame, and a movable frame is fixedly installed at the telescopic end of the hydraulic rod. The first movable plate and the second movable plate which can rotate are arranged to drive the upper contact block to deform and make contact with the outer surface of a workpiece, clamping and fixing force on the workpiece is formed, meanwhile, the fixed column is pressed through the telescopic column, the lower connecting block, the first movable plate and the second