Abstract: A garbage disposal system for household garbage which includes a crushing and shearing unit for the process to separate the liquid from the solid and to shear the solid into refuse strips, a screw friction machine to supply the heat source for a scrap metal recovery unit to collect scrap metal from refuse strips, a drying and a high-temperature heating process to heat refuse strips into dry state, a compressing process to compress refuse strips into refuse blocks, and a cement blocking process to make refuse blocks into caissons for sea water concrete or tidal land construction. Waste liquid filter and waste gas filter are used to filtrate impurities from waste liquid or gas.