The substation box is an important power facility, which can ensure the electricity used in our daily life. Whether in the city or in the countryside, the existence of the substation box can be seen. Most of the cabinets outside the substation box are processed by sheet metal technology, which mainly plays a role in protecting internal parts. The use requirements of cabinets are different, and the design and structural design requirements are also different. It is necessary to determine the appropriate size according to specific requirements to provide reasonable space for internal component configuration. The interior of the cabinet is connected to each other through bracket support, various screws, clamps, etc., and the spare parts are fixed to ensure the normal use of the cabinet. The appearance design is simple and tidy, the side plates are flat and without deformation, and the surface process is exquisite. The cabinet body has a firm structure, the bottom and the top can be fixed up and down, and can bear the load of the top cable and structure; each part and the internal and external overall structure have sufficient rigidity and toughness, strong stability, and not easy to deform; the assembly is consistent And interchangeability, the parts can be used as standard parts and general parts to the maximum extent, strong and free from looseness; the parts and the appearance have no sharp edges and bur; the protection level conforms to the industry standard and the logo is complete. The detachable structure is adopted, which is convenient for disassembly and assembly. It has good compression resistance, impact resistance, anti-electromagnetic and anti-radiation performance. The setting of cable management parts inside the cabinet should be reasonable, sufficient and convenient to operate. Necessary sealing components shall be arranged on the plane of the front panel of the equipment in the cabinet to ensure that all cold air enters the air inlet on the front of the equipment without leakage. The sealing panel, sealing baffle and other sealing components are made of materials that are not easy to deform, light, flame retardant or non-combustible.