Furnace wall structure of industrial kiln and industrial kiln

The utility model relates to the technical field of industrial kilns, and provides a furnace wall structure of an industrial kiln and the industrial kiln, and the furnace wall structure of the industrial kiln comprises a plurality of furnace wall bodies, a fiber layer and a sealing layer, the multiple furnace wall bodies are sequentially spliced in the length direction of the furnace wall bodies, and an expansion gap is formed between the end faces of every two adjacent furnace wall bodies. The furnace wall body is provided with a fire-backing surface and a fire-facing surface which are deviated from each other, and the fire-backing surface and the fire-facing surface extend in the length direction of the furnace wall body; the projection of the expansion gap on the horizontal plane comprises a plurality of sections which are connected in sequence; wherein the extending direction of at least one section in the multiple sections is not perpendicular to the plane where the fire facing surface is located; the fi