Novel building steel formwork

The utility model discloses a novel building steel formwork. Long cross beam, pin shafts are embedded in the end parts of the two sides of the long cross beam; the long cross beam is also provided with a correspondingly arranged sharp box; a lower wedge is inserted into the long cross beam; the lower wedge is tightly pressed with the sharp box; an upper wedge is inserted into the long cross beam;the upper wedge and the lower wedge are tightly pressed; a short cross beam is fixedly connected to the long cross beam; a bottom plate is fixedly mounted on the short cross beam; the bottom plate isconnected with beam body concrete; the upper wedge is connected with the beam body concrete through a side die; rubber strips are tightly filled between the side molds and the bottom plate; the bottomdie is compact in structure, convenient to use, stable and reliable in overall structure, capable of guaranteeing that joints are tight and free of slurry leakage without welding due to the fact thatthe bottom dies are in lap