The utility model discloses a solid -state change over switch power supply box. Wherein, this solid -state change over switch power supply box includes: the plastic width -lock type single -layer sealed packing case comprises a casin. Solid -state switch circuit sets up in the inside of box, the district that is qualified for the next round of competitions is provided with the multichannel and isqualified for the next round of competitions, and the multichannel is qualified for the next round of competitions and all is connected with solid -state switch circuit for the connection is qualifiedfor the next round of competitions. The utility model provides a technical problem of the unsatisfied multichannel of the solid -state change over switch in correlation technique wiring demand.