Cable core checking device

The utility model relates to the technical field of ship engineering, and discloses a cable core checking device, which comprises a light-emitting diode, a current-limiting resistor, a power supply, a switch, wires and wire clamps, the wire clamps, the light-emitting diode and the current-limiting resistor are respectively connected in series through the wires to form paired branch cables, and the power supply is connected with the switch. The wire clamp is used for clamping a core wire of a to-be-checked cable, and the plurality of alignment branch cables are connected in parallel in a single-end manner through the wire, are connected in series with the switch and the power supply, and then are connected with the wire used for grounding. According to the cable core checking device, the multi-core parallel circuit is adopted, so that a key effect on improving the cable alignment efficiency is achieved; a light-emitting diode is adopted as a light-emitting indicating component for component selection, so that