The utility model discloses a solid cabinet body structure, panel, both sides curb plate, roof and backplate on the frame are fixed, both sides including the frame to the cabinet body curb plate upper portion all be equipped with the thermovent, the internal heat conduction support that is equipped with of cabinet, the heat conduction support fix on the roof, the heat conduction support on flaggingly have a multi -disc fin, the heat conduction support on extend and need the heat conduction roof beam that heat -sink device contacted, the fin between be parallel to each other and perpendicular with the curb plate. The utility model has the advantages of cabinet body structure safe and reliable for daily use is more convenient, and the cabinet body structure is compacter, and the radiating effect is good, and the guarantee device can normally be worked, has promoted the overall price / performance ratio and the competitiveness of product.