The invention provides a smoke-free waste incineration system. The smoke-free waste incineration system comprises an incinerator, a dust blocking box, a tar treatment chamber, a rotational-flow sedimentation tank, a convection dust removal device and a smoke purification tower. The incinerator comprises a feeding device, a drying chamber, an incinerator body and a high-temperature smoke treatment tank. The incinerator body comprises an inner incinerator body part and an outer incinerator body part. The inner incinerator body part and the outer incinerator body part are installed on a base. A combustion chamber is defined by the high-temperature smoke treatment tank, the inner incinerator body part and the base. A smoke circulating chamber is formed between the inner incinerator body part and the outer incinerator body part. An ignition chamber, an incinerator bridge, an incinerator cover and a smoke diffusion cylinder are arranged in the combustion chamber. The top of the smoke diffusion cylinder is connected with the high-temperature smoke treatment tank. The incinerator cover is installed at the bottom of the smoke diffusion cylinder. A plurality of smoke diffusion holes are formed in the smoke diffusion cylinder. The incinerator cover is installed on the base. The feeding device communicates with the drying chamber. The drying chamber is installed on one side of the incinerator body. The inner incinerator body part communicates with the dust blocking box. The tar treatment chamber communicates with the dust blocking box. The rotational-flow sedimentation tank communicates with the convection dust removal device. The convection dust removal device communicates with the smoke purification tower. The smoke purification tower communicates with the incinerator through a smoke discharging pipe.