These series of trough boxes and partitions integrate with the organic and inorganic advantages, counteract the shortcomings of high cost, short fire-resistance time in organic products and bad corrosion resistance, bad weathering resistance in inorganic products. They are characterized in difficult to burn, anti-corrosivity, good weathering resistance, high strength and easy for construction. They are widely used in electric power, petrochemical, metallurgy, posts and telecommunications to protect all kinds of voltage grade cables indoor and outdoor from fire.