The invention provides a garbage incinerator. The garbage incinerator is arranged in the transverse direction and longitudinally comprises five stand incineration units. The first incineration unit is formed by combining a plurality of movable units in the transverse direction. The movable units are integrally supported by a supporting device and driven by the same drive device. Compared with other incinerator types, the garage incinerator has the advantages that the technology is mature and is the current absolute mainstream technology, the incinerator type is adopted in almost all large foreign incineration plants, and mechanical grate furnaces are adopted in built large incineration plants or large incineration plants under construction in China; an independent drying area is adopted, the garbage can be preheated and dried through incineration waste heat, and the garbage incinerator is suitable for the characteristics of the low garbage heat value and high moisture in China; operation is reliable and convenient, the adaptability of the garage is high, and secondary pollution is not likely to happen; the economical efficiency is high, the garage directly enters the incinerator without pretreatment, and the running cost is relatively low.