The utility model discloses a rebar vertical control structure. The device comprises a bottom template, a control piece and reinforcing steel bars, the reinforcing steel bars comprise lower-layer reinforcing steel bars and upper-layer reinforcing steel bars; the lower-layer reinforcements are spatially vertical to the upper-layer reinforcements; the control piece comprises a bottom base and a bracket; the bracket comprises three supporting rods and an arc-shaped supporting piece, the arc-shaped supporting piece is fixedly connected to the tops of the supporting rods, the side supporting pieceis located above the middle supporting piece, an opening of the middle supporting piece faces the direction perpendicular to the opening of the side supporting piece in space, the upper-layer steel bars are arranged on the side supporting piece in a falling mode, and the lower-layer steel bars are arranged on the middle supporting piece in a falling mode. According to the utility model, the bracket is embedded in the bottom base, and the bracket is suitable for floor slab construction with more protection layer requirements through the adjustable supporting rods. The two arc-shaped supportingpieces are perpendicular to each other towards the space, have height difference and adapt to the perpendicularity of the two-way reinforcing steel bars, it can be guaranteed that the reinforcing steel bars are perpendicular to each other in the reinforcing steel bar binding process while the thickness of a reinforcing steel bar protection layer is guaranteed, and standard requirements can be met.