High-strength composite board

The utility model discloses a high-strength composite board which comprises a composite board body, containing grooves are formed in the two adjacent side walls of the composite board body, the two containing grooves are located in the two sides of the side walls of the composite board body respectively, the opposite ends of every two containing grooves are rotationally connected with hanging rods capable of rotating by 90 degrees, and the hanging rods are matched with the containing grooves in size. Butt joint grooves matched with the hanging rods are formed in the other two side walls of the composite plate body, and a corrugated plate is integrally formed in the composite plate body. The side walls with the butt joint grooves are attached to the bottom corners of the wall, the hanging rods on the other two side walls are turned by 90 degrees to stretch out, another composite board body is taken, the butt joint grooves of the composite board body and the stretching-out hanging rods are installed in an inser