Abstract: Disclosed is a gap-free epidemic-preventing partition board structure, which includes a transparent board, a plurality of arc surfaces, two lateral side edges, a flat form, and a plurality of arc surface transitions. The arc surfaces are arranged on a bottom portion of the transparent board. The arc surfaces gradually change in an upward direction into the flat form. The two lateral side edges are arranged on two opposite sides of the arc surfaces and are on the same plane as the flat form. The arc surfaces include the arc surface transitions. The arc surfaces, the flat form, the two lateral side edges, and arc surface transitions that make up the gap-free epidemic-preventing partition board structure are integrally formed together as a unitary structure. The bottom in the form of multiple arc surfaces helps increase a contact area with a tabletop for securely standing thereon to achieve separation for epidemic prevention.