Electromagnetic shielding method for large-capacity high-speed optical interface communication equipment

The invention discloses an electromagnetic shielding structure of large-capacity high-speed optical interface communication equipment, which comprises a bottom plate, a left side plate, a right side plate, a front panel, a rear panel and a cover plate which are mutually spliced, and the edges of the bottom plate, the left side plate, the right side plate, the front panel, the rear panel and the cover plate are respectively provided with an L-shaped clamping table for splicing; a PCB, a built-in power source, a filter and a cooling fan are sequentially installed on the bottom plate in the direction from the front panel to the rear panel, a plurality of optical module cages are installed on the PCB, optical modules are installed on the optical module cages, a plurality of optical fiber line passing holes are formed in the front panel, optical fiber lines are connected with the optical modules, and the diameter of the optical fiber line passing holes is smaller than the thickness of the front panel. A key switch