A splicing structure, a splicing table, and a splicing and fitting device are provided. The splicing structure includes: a splicing adjustment component, a splicing alignment component, and a splicing base. The splicing adjustment component and the splicing alignment component are connected to the splicing base; and the splicing adjustment component is configured to support at least two to-be-spliced pieces; the splicing alignment component is configured to align the at least two to-be-spliced pieces to a first reference site. The splicing adjustment component is further configured to drive at least one of two adjacent to-be-spliced pieces in the at least two to-be-spliced pieces to move relative to the first reference site, to enable the two adjacent to-be-spliced pieces to be close to or far away from each other.