The utility model relates to a novel bank ship electric power wiring of two -way power supply device belongs to electric power wiring equipment field, including junction box and supply circuit, be provided with power supply mode select switch panel and multi -functional power meter panel on junction box's the case lid, be provided with current transformer, major loop contactor, wiring copper bar and control switch in junction box's the box, its characterized in that: supply circuit includes select switch Q1 and Q2, boats and ships main distribution board MSB and phase sequence protector KP1, boats and ships main distribution board MSB is connected with bank electricity power supply unit PG behind select switch Q1, select switch Q1 in proper order with multi -functional power meter P01 and phase sequence protector KP1 mutually the electricity be connected, select switch Q2 and select switch Q1 are parallelly connected. The bank ship electric power wiring device simple manufacture of two -way power supply, convenient to use can realize the two -way power supply of ship to shore, ship -to -ship simultaneously, are suitable for popularization and application.