Fault correction device and method for power cable cross interconnection box

The invention relates to a fault correction device and method for a power cable cross interconnection box, and the device comprises an inner core connection mechanism, an inner core electrode interconnection circuit, an outer core electrode interconnection circuit and an outer core connection mechanism, a grounding switching circuit, a control mechanism, and a phase sequence switching circuit, wherein the inner core connection mechanism, the inner core electrode interconnection circuit, the outer core electrode interconnection circuit and the outer core connection mechanism are connected in sequence, , and the phase sequence switching circuit is connected in series in a series branch. Each phase input terminal of the inner core electrode interconnection circuit is respectively connected with two switchers, one switcher is connected with the output terminal of the corresponding phase, and the other switcher is sequentially connected in series to form a loop; the input terminal and the output terminal of each p