The porous cable tray adopts a standardized modular structure design, with complete size specifications, and is compatible with mainstream cable laying construction standards on the market. The product comes with evenly distributed installation holes and heat dissipation holes, which do not require on-site secondary drilling and processing, greatly simplifying the construction process and reducing the labor and time costs of on-site operations. The edges and corners of the cable tray have been polished and passivated, making it less likely to scratch the cable sheath and construction personnel during the construction process, thereby improving construction safety. The splicing position adopts a universal docking structure, which can flexibly match accessories such as straight through, elbow, tee, and variable diameter, and is suitable for various construction schemes such as straight laying, corner routing, and layered wiring. The lightweight punching structure reduces the overall weight while retaining stable mechanical strength, making it convenient for handling, lifting, and fixing, and suitable for various conventional wiring projects indoors and outdoors.