Cable Tray based on the advantages of various bridges, focuses on improving heat insulation, heat dissipation and fire prevention. Its structure adopts composite, double insulation, internal and external flame retardant, fireproof, and has the advantages of exhaust heat dissipation and self-extinguishing on fire. The inner groove of the stainless steel bridge is made of glass fiber reinforced plastic and a variety of flame retardant and fireproof materials, and the outer surface is coated with fireproof paint. Its horizontal combustion, vertical combustion, dark heat length and other standards have reached the leading level at home and abroad.