The present application provides a wiring harness device a display device. A wiring harness device applied to a wire connected between two interfaces comprises: a wiring harness structure having a first wire inlet and a first wire outlet, the wire entering the wiring harness structure through the first wire inlet and exiting the wiring harness structure through the first outlet, the wiring harness structure configured to store and provide the wire, the wire being controlled to be in a relaxed state upon provision through stretching the wire.