Electromagnetic shielding rack

The utility model provides an electromagnetic shielding device-an electromagnetic shielding cabinet which can be used in a computer, can prevent electromagnetic waves from damaging a human body, can effectively prevent electromagnetic information of the computer from leaking, and can prevent external strong electromagnetic disturbance from influencing the normal work of the computer. The utility model comprises a cabinet bottom, a top cover and a lateral wall. The utility model also comprises frames, spring pieces, an upper waveguide window, a lower waveguide window, door knives, a wave filter, shielding glass, a perspective shielding glass door, a back door, a waveguide pipe and a frame of an optical transmitter and receiver, wherein, the four frames are fixed at the inner lateral wall of the cabinet, the frame of the optical transmitter and receiver is arranged on the four frames, the upper waveguide window and the lower waveguide window are respectively arranged on the top cover and the cabinet bottom, a door is arranged on the cabinet, four sides of the door are provided with the spring pieces, four sides of a door frame are provided with the door knives, and the front surface of the electromagnetic shielding cabinet is provided with the perspective shielding glass door. The utility model can be used in a computer and a server, can prevent electromagnetic waves from damaging a human body, can effectively prevent electromagnetic information of the computer from leaking, and can prevent external strong electromagnetic disturbance from influencing the normal work of the computer. The applicable frequency range is wide, and the utility model can satisfy the requirements of the B grade of Chinese Standard BMB3-1999 and the B grade of Chinese Army Standard GJBZz20219-94.