Self-locking type assembly top plate

The utility model relates to a self-locking type assembling top plate structure which comprises a plurality of pairs of top plate units which are connected in a butt joint mode. The locking screw rod is arranged at the butt joint position of the pair of top plate units in a penetrating mode, and a full-length locking groove is formed in the locking screw rod in the axial direction; the locking screw rod is in threaded connection with the locking groove, the locking nut is in threaded connection with the locking screw rod, the inner wall of the locking nut is provided with a limiting piece corresponding to the locking groove, one end of the limiting piece can be pressed, and the other end of the limiting piece is hinged to the locking nut. The locking nut is screwed on the locking screw through threaded connection, then the locking nut is clamped in the locking groove through the one-way spring limiting piece and cannot rotate backwards to retreat, self-locking of the top plate unit is achieved, the locking nu