CMTGK25/CMTGK35 CNC deep hole boring and scraping machine tools are 5-8 times more efficient than ordinary deep hole and honing machines. It is a processing equipment specialized in manufacturing hydraulic cylinders. He integrated rough boring and fine boring into one, using push boring to complete rough and fine boring in one go. After boring, he used the opportunity of retracting the tool to complete the rolling process at the same time. Rolling processing makes the workpiece roughness reach Ra0.4.