NOVELTY - High speed active composting comprises feeding solid waste into sorting device for separation and recovery; mechanically treating selected organic waste into granules and treating lignocellulose; adding wetting agent, dissociating agent and water, and uniformly stirring; carrying out high speed stabilization; adding softening agent and activating agent, carrying out activation reaction, carrying out steam instantaneous explosion operation; and refining product by controlling humidity and granularity of material, and adding compound with beneficial elements.    USE - Method of high speed active composting (claimed).    ADVANTAGE - The method transforms organic waste into high quality compost in one hour; improves water absorptivity of compost, water binding capacity, adsorptivity of nitrogen, phosphorus, potassium and microelements needed by plants, permeability, thermal insulation, and anti-flood and anti-desertification effects; completely kills bacteria and parasites; and decomposes toxic organic compound and stabilizes or removes excess heavy metal contained in material.    DETAILED DESCRIPTION - High speed active composting comprises:    (A) feeding solid waste comprising organic materials into sorting device for separation and recovery;    (B) mechanically treating selected organic waste into granules and primarily treating lignocellulose;    (C) feeding material into physicochemical pretreatment tank, adding wetting agent, dissociating agent and water exceeding the saturated state of materials, and uniformly stirring;    (D) carrying out high speed stabilization by avoiding generation of gas during heating and pressurizing, maintaining material in liquid or solid state, adding oxidant and heavy metal remover, and reducing pressure after oxidation reaction of easily decomposable organic material and partial oxidation reaction of cellulose;    (E) adding softening agent and activating agent into material, carrying out activation reaction in saturated steam state by heating and pressurizing, carrying out steam instantaneous explosion operation, and introducing material into product refining furnace; and    (F) refining product by controlling humidity and granularity of material, and adding compound with beneficial elements.    An INDEPENDENT CLAIM is included for a physicochemical pretreatment and high speed stabilization and high speed activation apparatus.