The invention provides an electromagnetic shielding device for an electronic communication device. The electromagnetic shielding device comprises a positioning groove, a copper foil tape and a conductive copper plate, wherein the positioning groove is formed in the middle portion of the upper end surface of a bottom plate, the copper foil tape is bonded to the front side of the conductive copper plate, the middle of the lower end surface of the conductive copper plate is provided with a round groove, a lower spring is welded to the middle portion of the lower end surface of the positioning groove, the upper end of the lower spring is connected to the lower end surface of a conductive copper column by welding, and a grounding wire is installed in the middle portion of the lower end surfaceof the conductive copper column. The lower end of the grounding wire extends to the outside of the lower end surface of the bottom plate, a guide post is mounted on the front portion of the annular side of the conductive copper column, the front end of the guide post is mounted in a guide groove, and the guide groove is formed in the front end surface of the positioning groove. A clamping groove is formed in the lower portion of the front side in the guide groove, and a containing groove is formed in the front end surface of the guide post. Compared with the prior art, the electromagnetic shielding device has the following advantages of achieving the quick disassembly function of the conductive copper plate and being good in electromagnetic protection.