An electrical plug connector includes an insulated housing received in a metallic shell, first and second terminal modules respectively above and below the insulated housing, and abutting plates (EMI (Electro-Magnetic Interference) plates). Each abutting plate (EMI plate) is between the metallic shell and the insulated housing. Each abutting plate (EMI plate) includes a main body and elastic arms outwardly extending from the main body. Each elastic arm includes a terminal contact portion and a shell contact portion. The terminal contact portion is extending toward a corresponding recessed hole of the insulated housing and contacts one or more first ground terminal of the first terminal module or one or more second ground terminal of the second terminal module. The shell contact portion contacts an inner surface of the metallic shell. Therefore, the high frequency features of the connector can be optimized effectively and resonant problems of the connector can be improved.