Music headrest plugging device of automobile seat and automobile seat

The invention provides an automobile seat music headrest plug-in device and an automobile seat, and the plug-in device comprises a shell assembly which comprises a first shell and a second shell; a headrest rod is slidably connected into the first shell and is hollow, and the bottom end of the headrest rod is open. The first connecting piece is arranged in the headrest rod, and a first conductive piece connected with a headrest sound equipment wire harness is mounted on the first connecting piece; the second connecting piece is arranged in the second shell, and a second conductive piece connected with a whole vehicle power amplifier wire harness is mounted on the second connecting piece; the plugging device comprises a first state and a second state, in the first state, the first connecting piece and the second connecting piece are clamped to seal the opening, and the first conductive piece and the second conductive piece are in contact to form electric connection; in the second state, the second connecting p