Sound insulation building board

The utility model relates to the technical field of building boards, in particular to a building sound insulation building board which comprises a first body and a second body, first limiting grooves are formed in the left sides and the right sides of the top ends of the first body and the second body, and second limiting grooves are formed in the left sides and the right sides of the front ends and the left sides and the right sides of the rear ends of the first body and the second body. The adjacent first limiting grooves and the adjacent second limiting grooves are connected through the first limiting blocks and the second limiting blocks correspondingly, the building board can be conveniently mounted and dismounted, the practicability is improved, the first limiting blocks are clamped into the first limiting grooves, the second limiting blocks are clamped into the second limiting grooves, and therefore the building board can be conveniently mounted and dismounted; and the first body and the second body ca