NOVELTY - The device comprises a hopper cylinder provided with a waste, a rotary drive motor installed inside the cylinder along an outer surface, a forward screw shaft inclined towards forward direction of a screw thread, a backward screw shaft inclined toward backward direction of the screw thread, and a rotation cutter that cuts the solid fuel ejected from a metal mold part. The metal mold part includes multiple emissions through holes for moving the waste. The cylinder comprises a moisture exhaust ball to maintain moisture while heating in a heater to discharge heat through a steam exhaust hole.    USE - The device is useful for producing solid fuels (claimed) from combustible wastes including paper, timber (sawdust), fiber and plastic materials, where the solid fuel is used as a heating source to power an incineration facility and generating electricity facility.    ADVANTAGE - The device can compress the waste material by rotating the forward direction helical thread and the backward direction helical thread for a specified period in an economical manner with reduced failure rate.    DETAILED DESCRIPTION - The device comprises a hopper cylinder provided with a waste, a rotary drive motor installed inside the cylinder along an outer surface, a forward screw shaft inclined towards forward direction of a screw thread, a backward screw shaft inclined toward backward direction of the screw thread, and a rotation cutter that cuts the solid fuel ejected from a metal mold part. The metal mold part includes multiple emissions through holes for moving the waste. The cylinder comprises a moisture exhaust ball to maintain moisture while heating in a heater to discharge heat through a steam exhaust hole. Replacement screw is protruded along the backward direction helical axis and the forward direction helical axis is formed respectively. The metal mold part includes a heating wire that is extended to a penetration hole. A vent is formed in the metal mold part for compacting the waste.