The invention discloses a steel structure wall surface window forming structure which comprises a rectangular wall surface steel frame (1) constituted by mutual welding of pieces of structural steel.Inclined strut frames (2) are symmetrically arranged inside the wall surface steel frame (1) and constituted in the mode that two pieces of structural steel are mutually welded in a crossed mode and fixed into a whole. Window frames (3) are arranged between the adjacent inclined strut frames (2) and are each of a rectangular frame structure overall. Connecting pieces (4) for fixing the window frames are arranged at the four corners of the window frames (3), one ends of the connecting pieces (4) are fixed to the outer sides of the right-angle corners of the window frames (3), and the other endsof the connecting pieces (4) are vertically fixed to the inner side faces of the inclined strut frames (2). The steel structure wall surface window forming structure is simple in structure and wholemounting work, and especially suitable for the window forming structure between the two inclined strut frames, the steel structure strength in a wall is not damaged, and meanwhile the connection strength between the two adjacent inclined strut frames is further improved.