Boiler for combusting rice hull

The utility model provides a boiler combusting rice hull, for resolving the problems that the coal resource has increased scarcity and price day by day, and will generate much ash in combustion, while people are always looking for substitutes. The boiler is characterized by comprising a pot and a furnace, wherein the height of a material inlet is 350 to 450mm, the upper arch and the lower arch of a combustion chamber are respectively provided with a plurality of division walls, the upper arch division walls and the lower arch division walls are arranged at interval along the longitudinal direction of the combustion chamber, to divide the combustion chamber into a S-form combustion chamber, and the upper arch division walls are provided with vent holes. A char particle recycle device is arranged between the flue gas pipe and the chimney. The boiler combusting rice hull can save coal, realize zero discharge and completely utilize abundant national rice hull resources, having high practicality.