Boiler bottom structure

The utility model discloses a boiler bottom structure. The boiler bottom structure is capable of fully burning, and pipelines are not easily damaged. The boiler bottom structure comprises a barrel, wherein a plurality of pipelines which are distributed side by side are arranged at the bottom of the barrel; each two adjacent pipelines are connected by two support plates; each two adjacent pipelines and the corresponding two support plates form a hollow region; one end of each pipeline is communicated with a main pipe; the other end of each pipeline is communicated with a secondary pipe; each pipeline is provided with a plurality of air ducts which are communicated with the interior of the pipeline; hoods are arranged on the upper ends of the air ducts; a plurality of air outlet holes which are used for communicating the interiors of the air ducts with the external are respectively formed in the hoods; ash buckets are arranged below the pipelines; a burner is arranged on the barrel above the pipelines. The boiler bottom structure has the advantages that air is led into the pipelines, the support plates are arranged between adjacent pipelines, ashes after burning are discharged in time, the stay of the ashes in the barrel is reduced, and the condition that the pipelines are damaged since the temperature of a bottom bed material is overhigh is thus prevented.