The invention discloses a node stone spliced structure of three-dimensional distorted special-shaped spiral stairs. The node stone spliced structure of the three-dimensional distorted special-shaped spiral stairs comprises vertical plate stone (1), a stone connecting strip (2) and bottom plate stone (3). The vertical plate stone (1) and the stone connecting strip (2) are bonded; the edge, near the stone connecting strip (2), of the vertical plate stone (1) is provided with a groove I; the cross section of the groove I is square; the edge, near the vertical plate stone (1), of the stone connecting strip (2) is provided with a groove II; the cross section of the groove II is L-shaped; the outer surface of the joint of the vertical plate stone (1) and the stone connecting strip (2) is provided with a process groove formed by the combination of the groove I and the groove II; the cross section of the process groove is in a Chinese character 'tu' shape; one side, near the bottom plate stone (3), of the stone connecting strip (2) is provided with a protruding strip; and the bottom plate stone (3) is lapped on the protruding strip of the stone connecting strip (2). According to the node stone spliced structure of the three-dimensional distorted special-shaped spiral stairs disclosed by the invention, the traditional bevel edge breakage phenomenon is overcome, a splicing manner is simple, the stone texture is smooth and natural, the overall quality is improved, and the quality is promoted.