XPS foam board line is mainly composed of six parts of mixing system, extruder, foam agent injection system, traction system, conveying cutting system, recycling and; pelletizer system. The main configuration: raw material mixture and auto conveying equipment parallel twin-screw extruder high pressure foam agent injection system type extruder extrusion head foam table primary tractor transfer and; cooling rack secondary tractor and width cutting equipment length cutting equipment recycling pelletizer system.