Stiff beam formwork support-free reinforcing device

The utility model relates to a support-free reinforcing device for a stiff beam formwork. The support-free reinforcing device comprises a U-shaped hoop, I-shaped steel, an opposite-pull screw rod, a beam side supporting part and a beam bottom supporting part. The U-shaped hoop is inverted-U-shaped and is connected with the upper flange of the I-shaped steel, the tail end of the U-shaped hoop is connected with the beam bottom supporting part, and the beam bottom steel pipe is arranged at the beam bottom supporting part, so that the bearing capacity is improved; on the horizontal plane, the opposite-pull screw is divided into a left section and a right section, one end is welded with the web of the I-shaped steel, and the other end penetrates through the beam side supporting part; the prepared stiff beam formwork support-free reinforcing device has the excellent characteristics that supporting is stable, a vertical rod does not need to be erected, and a split screw does not need to penetrate through an I-shaped