The utility model relates to the technical field of heat preservation decorative plates, and discloses a
building energy-saving outer wall heat preservation decorative plate structure which comprises a base plate, an inserting groove is formed in one side of the base plate, a
locking mechanism is fixedly arranged on the inner wall of the inserting groove, and an inserting block is fixedly arranged on the other side of the base plate. A rock
wool heat preservation plate is fixedly arranged on one side of the base plate, a heat preservation mechanism is fixedly arranged on one side of the rock
wool heat preservation plate, a
veneer is fixedly arranged on one side of the heat preservation mechanism, and a groove is formed in the surface of the
veneer. According to the
building energy-saving outer wall heat preservation decorative plate structure, through the arrangement of the locking mechanisms and the inserting blocks, when the base plates are installed and spliced, the inserting blocks are inserted into the inserting grooves, the inserting blocks extrude the locking blocks to enable the locking springs to contract, after the locking blocks are inserted in place, the locking springs rebound the locking blocks to lock the inserting blocks, bolts or other tools are not needed for installation, and installation is convenient. And the construction and installation efficiency of personnel is improved.