Building indoor heat insulation plate

The utility model provides a building indoor heat insulation board, which comprises a board body, a connecting rod and a screw rod, a plurality of telescopic walls capable of vertically extending are arranged on the inner wall of the middle section of the board body, connecting holes are arranged on the side walls of the two sides of the board body, threads are arranged on the inner wall of the connecting hole positioned on one side of the board body, the connecting rod is movably connected in the connecting hole, and the screw rod is connected with the connecting rod. A butt-joint groove is formed in the inner wall of the bottom of the plate body, a screw rod is movably connected in the butt-joint groove, a butt-joint column is fixedly connected to the top of the plate body, and the butt-joint column can be spliced with another plate body; the utility model provides an indoor heat insulation plate for a building, and aims to solve the problem that the size of the conventional heat insulation plate cannot be