A structure for double-sided light box, comprising a frame having a plurality of wiring ducts disposed on its inner surface for placing electric wires, said frame having two trenches correspondingly disposed on an outer rim of said frame, an upper and a lower lid pivotally connected to said trench with a plurality of spring blades disposed among said upper and said lower lid and said frame to fixedly hold said upper and said lower lid to said frame by means of a elastic force of the spring blades; a recess being disposed at a inner rim for holding surrounding edges of a lighting component and a double-sided backlight module; said backlight module having its upper and lower surface attached to one advertising panel respectively, with said upper and said lower lid clasping fixedly advertising panels and said backlight module; when said lighting component generating a first light source, said first light source projecting light on said backlight module to let said upper and lower surface of said backlight module to generate second and third light sources, which in turn display the two advertising panels through second and third light sources of said backlight module to implement two-way advertisement.