Combined electric appliance box

The invention relates to a combined electric appliance box. The combined electric appliance box comprises an upper cover of which the section is in a shape of reversed U, and a lower U-shaped cover which is embedded into and connected with the upper cover to form a box body; a row of output power or signal sockets is arranged in a top plate of the upper cover in the length direction; inward folding step parts are respectively arranged at the lower parts of side droop plates connected to two sides of the upper cover and positioned at the inner sides of two side plates of the lower cover; a plurality of threaded holes are formed in the inward folding step parts in the length direction; the inward folding step parts are connected with the upper cover through connecting bolts which penetrate through the upper parts of the two side plates of the lower cover to be screwed with the threaded holes; a chute is formed in the lower side of a bottom plate of the lower cover in the length direction; a matched sliding block is arranged in the chute; a connecting component for connecting and positioning the box body is arranged on the sliding block. The combined electric appliance box is simple and compact in structure, and convenient to connect and position with a cabinet.