Porous cable trays can be made of various high-quality substrates such as cold-rolled steel plates, galvanized steel plates, aluminum alloys, etc., to meet the needs of different working conditions and environments. The metal substrate undergoes professional surface treatment processes, including hot-dip galvanizing, electroplating, spray coating, fireproof coating and other treatment methods, which can effectively resist the corrosion of water vapor, slight acidic and alkaline substances, and dust in the air, and enhance the anti rust, anti-corrosion, and antioxidant capabilities of the product. The regular punching process adopts precision mechanical stamping forming, and the edge of the hole is flat without burrs, which will not cause wear to the cable sheath. The overall structure has good toughness and is not prone to deformation, cracking, and other problems. It can be used stably in industrial and building environments with normal temperature, humidity, and dust. It has the characteristics of long-term durability and reduces the frequency of maintenance and replacement in the later stage.