The geometric flat structure of the foundation and the extremely pure assembly structure are another attempt to the mechanical properties of recycled concrete, changing the utilization mode of aggregate, improving the utilization rate and production speed of waste, and exploring the development possibility of assembled furniture with both artistry and practicality. We use 35% recycled plastic as aggregate to mix with high performance concrete for production. The surface of the bench is ground and polished, and the highly saturated blue, green and yellow concrete collides with the random particles of recycled plastic particles, and the recycled plastic particles are scattered at will, with free color distribution, large-scale mass and free tension, and are integrated into the public space.