Lintel formwork reinforcing device

The utility model discloses a lintel formwork reinforcing device which specifically comprises a supporting column, a supporting piece is welded to the top of the supporting column, a U-shaped clamping groove is welded to the top of the supporting piece, a supporting bottom support is arranged at the bottom of the supporting column in a threaded and sleeved mode, and a fixing sleeve piece is movably arranged outside the supporting column in a sleeved mode. The fixing sleeve piece comprises a lantern ring arranged outside the supporting column in a sleeving mode, and the lantern ring and the supporting column are fixed together through a fixing bolt. According to the lintel formwork reinforcing device, the supporting columns, the supporting pieces and the U-shaped clamping grooves which are made of steel are used for reinforcing the lintel formwork, the reinforcing device is high in structural strength and does not deform, and the problems of quality defects such as lintel breakage and formwork expansion in the