Medical garbage incinerator

The utility model discloses a medical garbage incinerator which comprises an incinerator body with a vertical cylindrical structure, a feeding device and a reciprocating type lifting charging device, wherein the feeding device and the reciprocating type lifting charging device are arranged on an incinerator top, the incinerator body is composed of a main burning chamber and an annular secondary burning chamber, and the main burning chamber is provided with a rotary grate and a tower type arch breaking crushing device; the center main burning chamber and the annular secondary burning chamber presents a structure like the Chinese character ' hui', the main burning chamber and the secondary burning chamber use an integral structure, and the fume which enters from the main burning chamber into the secondary burning chamber through a labyrinth fume channel is emptied after post-processed; the combustion-supporting air is divided into three parts to enter the main burning chamber, the heat conduction of the annular baffle wall and the heat conduction of a hanging device for big materials cause the unburnt fume to make a secondary combustion in the secondary burning chamber, the heat of the burned incineration object is completely used, and the convection, the conduction and the radiation of the heat energy are completely used to increase the temperature of the secondary burning chamber. The utility model does not need to add the auxiliary fuel to support combustion to cause the temperature of the secondary burning chamber and the stay time of the fume to reach the standards, and reduces the operation cost.