This machine unit is composed of conical double-screw extruder, mould, vacuum calibration table, haul-off machine, cutter, and material reversal stacker, etc. The extruder adopts AC frequency conversion driving system, and it is simple to maintain. PVC+ wood powder is mainly applied to produce WPC profiles such as building partition, cabinet door panels, windowsill, wall decorative panel, skirting, door frame, window shutters, photo frame, furniture edge banding, stair handrail, floor board, decoration cladding panel, plastic door and window profiles, aluminum-plastic composite profiles, decoration profiles, etc.