The invention relates to a full-automatic carbonization furnace for treating diseased animals. The full-automatic carbonization furnace comprises a diseased animal carcass crushing system, a furnace body, a heating system, a cooling system and a waste gas purification system, wherein the diseased animal carcass crushing system comprises a lifting hook, a grapping hook, a diseased animal carcass crusher and a feeder; the furnace body comprises an external-heating continuous carbonization furnace, a biological substance combustor I, an explosion-proof opening I, a rotating motor, an exhaust hole, a smoke removing hole, a discharge opening, a discharging trolley and an explosion-proof opening II; the heating system comprises a biological substance combustor II, a secondary combustion chamber, a secondary combustion chamber exhaust hole, an explosion-proof opening III and a ventilator; the cooling system comprises a low-position circulation water tank, a water inlet, a circulated water cooling pump, a circulated water cooler, a circulating pump, a quench tower, a quench tower exhaust hole, a washing tower, a water outlet I and a water outlet II; the waste gas purification system comprises a pulse plasma processor, an activated charcoal adsorption tower, a draught fan and an exhaust pipe. The full-automatic carbonization furnace has the benefits that the step of conveying diseased animal carcasses is avoided, so as to reduce the pathogen transmission possibility to the most extent; through carbonizing treatment of the diseased animal carcasses, the diseased animal carcasses can be recycled, so that the economic benefit is improved.