Double-power transfer switch

A double-power transfer switch is characterized in that an inner part of the transfer switch is provided with four slots, each slot is provided with bidirectionally overlapped sheet metal which can be plugged and unplugged, one end of the sheet metal has a lapping sheet which is connected with a output end contact, the other end is provided with two lapping sheets which are connected with a contact of a frequently-used power supply and that of a stand-by power supply respectively, the height of the sheet metal is half the height of the slots, and positions of the slots higher than the sheet metal are coated with insulation paste for fixing the sheet metal. The double-power transfer switch has the beneficial effects that due to adoption of double lapping bridge connection, inner multiline connection is avoided, so that the inner structure is clear, and the switch has a long life and is not easy to damage, and since inner line connection is omitted, the overall size of the switch is reduced, and is easy to moun