Multi-frequency-band high-shielding-effectiveness shielding box based on carbon nanotube film

The utility model provides a multi-band high-shielding-effectiveness shielding box based on a carbon nanotube film. The shielding box comprises a box body and a box cover. The box cover is hinged to the upper portion of the box body, the box cover and the box body are buckled through the box buckle, and a sealed inner hollow structure is formed. The inner side part of the box body is connected with a box body baffle; the inner side part of the box cover is connected with a box cover baffle; the box body baffle exceeds the opening of the box body, and the box cover baffle is lower than the opening of the box cover; carbon nanotube films are attached to the inner sides of the box body, the bottom of the box cover, the box body baffle and the box cover baffle, so that the multi-band high shielding effectiveness is realized, 53-71dB can be realized at 200k-100MHz, and 62-86dB can be realized at 100M-1GHz; and 73 to 97 dB can be realized at the frequency of 1G to 18GHz. The mobile phone shielding device can shield