Shielding piece

The invention provides a shielding piece for shielding electromagnetism of an electronic device. The shielding piece is formed as a box type shielding case in a shape matched with that of the electronic device. The shielding piece comprises side walls and a top cover, wherein bonding pads for the adhesion of the shielding case onto a circuit base plate in an SMT (Surface Mounted Technology) are formed on the bottoms of the side walls; clamping grooves are arranged in the external surfaces of the side walls; the top cover is formed as a disassembly part for maintenance; a cutting part matched with a disassembly tool to use is arranged on the periphery edge of the top cover, so that the disassembly part is opened from the cutting part by the disassembly tool and then the electronic device in the shielding cover is repaired; and multiple radiation holes are arranged in the top cover. With the adoption of the shielding piece, disassembling the shielding piece to repair the electronic device in the shielding piece