The invention provides a seam-reserved type hidden frame ceiling structure. The seam-reserved type hidden frame ceiling structure comprises a lifting rod, a light steel keel, a hanging plate keel, a keel hanging piece and ceiling plates. The light steel keel is suspended under a floor slab through the lifting rod, the hanging plate keel is mounted on the light steel keel through the keel hanging piece, the hanging plate keel comprises a top plate part, a protruding part is arranged in the middle of the top plate part, clamping plate parts being folded and inclined towards the protruding part are arranged on the two side edges of the top plate part, and the clamping plate parts and the protruding part form clamping openings. A plug-in plate is arranged on the side edge of each ceiling plate, and the plug-in plates of the adjacent ceiling plates are inserted into the two clamping openings of the hanging plate keel in a connected mode. Based on the structure, a gap is generated through separation between the adjacent ceiling plates by the protruding part, and accordingly the ceiling plates are convenient to dismount and mount. In addition, the plug-in plates of the adjacent ceiling plates are inserted into the clamping openings of the hanging plate keel in a connected mode, so that the ceiling plates do not affect each other any more, and thus integral leveling and independent dismounting and mounting of the ceiling plates are achieved. What's more, the widths of the gaps are even and arranged in order, hoisting pieces such as the light steel keel cannot be exposed, and accordingly the attractiveness of the ceiling plates is improved.