The invention discloses a hazardous waste melting disposal method and belongs to the field of hazardous waste treatment. The hazardous waste melting disposal method can treat solid organic hazardous wastes, liquid organic hazardous waste and solid inorganic hazardous wastes at the same time. The hazardous waste melting disposal method mainly comprises the following steps of performing reduction pretreatment on the solid organic hazardous wastes, performing concentration pretreatment on the liquid organic hazardous wastes, performing burdening, mixing and briquetting on the solid inorganic hazardous wastes, a flux and a reducing agent to obtain a lump material, and transferring the lump material and an intermediate product obtained in the pretreatment step into an oxygen-enriched side blownmelting disposal furnace together for melting disposal to obtain a crude metal ingot and a vitreous water-quenched slag product; and performing secondary combustion, heat recovery and flue gas purification on flue gas produced with melting disposal, and performing standardized discharge on the treated flue gas. The hazardous waste melting disposal method provided by the invention has the advantages of wide application range of raw materials and capability of thoroughly realizing safety disposal and resource recovery of the hazardous wastes.