The utility model relates to a plug internal frame which is the data line plug, and is especially relates to a standard HDMI high definition data line plug, and is the data line plug internal frame. The plug internal frame comprises an internal frame body (1) and an auxiliary internal frame (2), a tenon (11) is arranged on the internal frame body (1), a mortise (21) is provided on the auxiliary internal frame (2), the internal frame body (1) and the auxiliary internal frame (2) are plugged through the tenon (11) and the mortise (21), and several terminal wire ducts (22) are provided on the two sides of the auxiliary internal frame (2). By employing the above structure, the wire duct is provided on the auxiliary internal frame, each lead wire is accommodated in the wire duct, thereby the tidy arrangement of the lead wire is ensured, the welding is convenient, the distortion is difficult while packaging; the auxiliary internal frame and the internal frame are plugged as one body, thereby the usage frequency of the plug can be substantially increased, and the quality of the plug is enhanced.