Protective dual-power automatic change-over switch

The utility model relates to a protective dual-power automatic change-over switch, which comprises a bottom plate, an automatic change-over mechanism arranged on the bottom plate and a switch body arranged on the bottom plate and matched with the automatic change-over mechanism, and the switch body is provided with a protective cover covering a wiring board. A housing of the switch body is provided with an accommodating groove matched with the protective cover at a position corresponding to the wiring board, two sides of the accommodating groove are respectively provided with a guide groove, two sides of the protective cover are respectively provided with guide raised lines matched with the two guide grooves, the guide raised lines are clamped in the guide grooves, and the guide raised lines are clamped in the guide grooves. And the protective cover is clamped and matched with the shell. The utility model has the advantages of simple structure, stable and reliable performance, and convenient assembly. 本实用新型涉及