Double-column double-station extrusion screen changer is used for chemical fiber, blown film, flat film, cast film production, pipe, sheet, wire, fiber manufacturing, pelletizing line, recycling, etc. The double-column double-station screen changer provided by Zhengzhou Batte can be divided into the following three types according to the shape of the filter screen: Double-column double-station screen changer ZB-DP-2R type, its filter screen shape is round; ZB-DP-2E type, its filter screen shape