The invention discloses a hazardous waste plasma melting treatment system, and relates to the technical field of hazardous waste treatment. The system comprises a plasma melting furnace, a crusher, agranulator, an incineration residue bin, a fly ash particle bin, a mixing conveyor, a feeding buffer bin, a residue salvaging machine, a flue gas regulator, a rotary kiln incinerator secondary combustion chamber and a plasma torch. The plasma melting furnace is adopted for hazardous waste incineration treatment, incineration residues, fly ash and other materials serve as main treatment materials,and cullet and lime serve as auxiliary materials (fluxing agents). After the technical scheme is adopted, the method has the beneficial effects that a, toxic, harmful, dangerous and non-dangerous waste, including organic, inorganic, gaseous, liquid and solid waste, can be treated; b, the generation amount of dioxin in the treatment process is extremely small; c, treated furnace slag is non-toxic and harmless vitrified slag, is an inert substance, is extremely low in permeability and can be used as a roadbed material; and d, the waste breaking efficiency is up to 99% or above.