Automatic change-over switch

The invention discloses an automatic change-over switch, which comprises an integrated base, and is characterized in that a first power supply operating mechanism and a second power supply operating mechanism are reversely arranged on the integrated base by taking a horizontal center line 'X' of the base as a reference, and are centrally arranged on a vertical center line relative to a vertical center line 'Y' of the base; the automatic change-over switch sequentially comprises a neutral pole N, a phase pole A, a phase pole B and a phase pole C from left to right; the manual operation mechanism of the first power supply operation mechanism is arranged at the phase pole A, and the manual operation mechanism of the second power supply operation mechanism is arranged at the phase pole B; the neutral line overlapping device and the interlocking assembly are arranged on the left side and the right side of the base respectively; the neutral line overlapping device is arranged on the left side of the base and locate