The invention relates to a solid waste treatment device and belongs to the technical field of waste treatment. The solid waste treatment device comprises a pretreatment device, a decomposition chamber, a combustion chamber, an acid removal device and a denitration device, wherein the decomposition chamber is internally provided with a first heating device, a first pump head and a first oxygen concentration sensor, a first residue tank and a first air pump are installed at the bottom of the decomposition chamber, a second heating device, a second oxygen concentration sensor and a second pump head are installed in the combustion chamber, and the bottom of the combustion chamber is provided with a second waste slag tank and a second air pump. According to the solid waste treatment device, solid waste is pretreated to be subjected to pyrolyzation and combustion, generation of dioxins is greatly reduced, a small amount of the generated dioxins is decomposed, the possibility that the generated dioxin pollutes the environment during combustion treatment is greatly reduced, the processing temperature is significantly reduced, the solid waste treatment device is more energy-saving and environment-friendly, meanwhile, exhaust gas is purified to be discharged, the exhaust gas is more environment-friendly, and the solid waste treatment device is more environment-friendly to the environment.