Autoclaved aerated concrete plate connecting device

The utility model relates to the technical field of autoclaved lightweight aerated concrete partition boards, and discloses an autoclaved aerated concrete board connecting device which comprises two board bodies, rectangular grooves are formed in the sides, close to each other, of the front faces of the two board bodies, and the interiors of the rectangular grooves in the two board bodies are communicated with each other. The two rectangular grooves are internally and fixedly connected with box bodies with one sides being open, the two box bodies make contact with each other, the sides, close to each other, of the two box bodies are each provided with a semi-arc groove communicating with the interior of the box body, and a cylindrical hole is formed between the two semi-arc grooves. Through the arrangement of the columnar block and the push plate, the columnar block is inserted into the columnar hole formed by the two semicircular arc grooves and rotated by 45 degrees, splicing of the two plate bodies can be