The invention provides an assembly-type splicing closing structure of veneers. The structure comprises a first connecting piece used for connecting two adjacent veneers and provided with a clamping head, and a second connecting piece used for connecting the two adjacent veneers and provided with a clamping groove, wherein the clamping head extends into a splicing joint between the two corresponding veneers, the surface of the clamping head is provided with at least one protrusion, and the protrusions are provided with arc surfaces; the clamping groove extends into a splicing joint between thetwo corresponding veneers and is internally provided with at least one cavity, the inner wall of each cavity is an arc surface, and the protrusions are clamped in the cavities. Compared with the priorart, the splicing joint between the two adjacent veneers is more compact, in addition, it is ensured that a closing part is flatter and more attractive, the closing structure is more stable, and installment is more simple.