In order to effectively prevent and treat the common faults of ship electrical equipment and ensure the long-term safe and stable ship operation, in view of generator faults, motor faults, main distribution board faults, and power grid system faults, the common fault causes of ship electrical equipment are analyzed, the common fault inspection technologies of ship electrical equipment are introduced, and the common fault maintenance methods of ship electrical equipment are proposed, which can provide reference for improving the efficiency and quality of common fault maintenance ship electrical equipment.