The plastic extruder hydraulic double screen changer is suitable for pelletizing, PE, PP, PPR, PERT pipe, sheet, sheet, cast film, non-woven fabric, chemical fiber spinning and other production that requires uninterrupted material flow and high continuity when changing the screen. The pet double screen changer is designed with two columns and two runners, with two screens working at the same time. When changing the screen, one screen works and one screen is replaced without stopping to change th