The invention provides an electromagnetic shielding method of an aviation plug. The method comprises the specific operation steps that an internal signal line is vertically arranged on an outer metal shell and is made of metal; the outer side of the internal signal line is provided with a cable shielding layer which makes contact with the outer side face of the metal of the internal signal line in a 360-degree even surrounding lap joint mode; the outer side of the cable shielding layer and the outer side of the outer metal shell are respectively provided with shielding connection points, and an aviation plug shell is arranged between every two adjacent shielding connection points. Compared with the prior art, according to the electromagnetic shielding method of the aviation plug, influence caused by the skin effect is reduced by enlarging the cross sectional area of the cable shielding layer, high-frequency common mode impedance is reduced, interconnection reliability of electronic equipment is enhanced, and the electromagnetic shielding method is beneficial for reducing electromagnetic interference and improving electromagnetic tolerance.