Secure protection switch

A safety protective switch includes a switch shell provided with an opening at the top part, a switching button pivoted in the opening of the switch shell, two electrically conductive metal sheets passing through the bottom part of the switch shell and extending outwards, and double alloy sheets with one end fixedly and electrically connected with one of the electrically conductive metal sheets and the other end (as an unfixed end) in linkage with the switching button to contact or separate from the other electrically conductive metal sheet. The safety protective switch further includes an actuation spring leaf, which is positioned between the switching button and the double alloy sheets and fixed on the switching button. The utility model is characterized in simple structure, low production cost, and good protective effect, and provided with switching button fixing function and free release function in case of over-current without being influenced by external factors.