Connecting structure of fabricated building boards

The utility model discloses an assembly type building board connecting structure which comprises a board body, a clamping groove is formed in the upper surface of the board body, a limiting groove is formed in the upper portion of the outer wall of one side of the board body, an inserting groove is formed in the upper portion of the outer wall of the other side of the board body, and a clamping plate is fixedly connected to the bottom of the board body. The board further comprises inserting-connecting assemblies arranged on the inner walls of the upper inserting-connecting groove and the lower inserting-connecting groove, connecting assemblies are rotationally connected to the inner walls of the inserting-connecting assemblies, each connecting assembly comprises a rotating rod rotationally connected to the inner wall of the corresponding fixing assembly, and through the arrangement of the connecting assemblies, the rotating rods are connected to the inner walls of the fixing assemblies in a rotating mode. And