The invention relates to a decorative section which is prepared by the following raw materials by weight percent: 39%-71% of heavy calcium carbonate or mine tailing sand, 25%-50% of waste plastics and 4%-6% of chemical additives, wherein the chemical additives comprise the following components: heat stabilizer, stearic acid, chlorinated polyethylene, titanium dioxide, paraffin, antioxidant and anti-ultraviolet agent. The decorative section has the benefits of good heat conduction performance, good heat stability, good environmental protection performance, no thermal expansion and contraction, erosion resistance, antibacterial property, mothproof property, resistance to water soaking, fire resistance, flame retardancy, anti-skid property, no burst, good anti-deformation property, good electrostatic prevention, good elasticity, good product quality, greenness, environmental protection, capability of changing waste into treasure, and low cost.