Biomass particle combustion boiler

The invention discloses a biomass particle combustion boiler, and relates to the technical field of combustion devices. The combustion boiler includes a boiler body, a feeding pipe, an ignition device, a fire outlet, and an air supplying cavity. The fire outlet, the ignition device and the feeding pipe all communicate with the boiler body. A plurality of air vent holes are formed in the side wallof the bottom of the boiler body. The air supplying cavity is located in the bottom of the boiler body, and the interior of the air supplying cavity is provided with an air inlet pipe. The boiler bodyincludes an outer barrel body and an inner barrel body. The outer barrel body and the inner barrel body form a heat insulation cavity in a spaced mode. The outer wall of the inner barrel body is provided with a heat preservation cotton layer, and the inner wall of the inner barrel body is provided with a concrete layer. The inner barrel body is in a C shape. The upper end of the inner barrel bodycommunicates with the fire