Splicing type extrusion molding insulation board and splicing structure thereof

The utility model discloses a splicing type extrusion molding heat preservation board and a splicing structure thereof, the splicing type extrusion molding heat preservation board comprises a heat preservation board body and a waterproof board, a waterproof groove is formed in the back face of the heat preservation board body, and the surface of the waterproof board is connected with the inner surface of the waterproof groove in a sliding mode. According to the splicing type extrusion molding insulation board and the splicing structure thereof, a rotating block is rotated to drive a connecting block to move until the connecting block completely slides into a telescopic groove, at the moment, a clamping block of a next insulation board body is inserted and clamped along the inner surface of a clamping groove in a previous insulation board body, and the rotating block is loosened, so that the clamping block is clamped in the telescopic groove due to reciprocation of a spring; the connecting blocks slide into th