Solid fuel combustion method and combustion device

The invention provides a solid fuel combustion method and combustion device. The combustion device comprises a hearth, wherein the hearth is provided with an air inlet and a solid fuel feeding opening; the feeding opening is formed in the top of the hearth,; a grate is arranged in the hearth, corresponding to the feeding opening; fuel fed from the feeding opening forms a material stacking layer on the grate; the side, close to a combustion cavity, of the material stacking layer is a combustion side; the side, opposite to the combustion side, of the material stacking layer is an air inlet side; and the air inlet side is provided with a side wall only allowing air to be supplied to the upper part of the material stacking layer, so that main air flow produced by air entering the hearth enters the material stacking layer from the upper part of the air inlet side of the material stacking layer, enters the combustion cavity from the combustion side after passing through the material stacking layer, and is finally discharged from a tail gas outlet. The combustion device not only can fully burn volatile components in the solid fuel, but also solves a molten ash problem and ensures the continuous combustion of the fuel.