Reinforcing device for slab in concrete structure

The utility model discloses a reinforcing device for slab in concrete structure, comprising spacer bars oppositely arranged at two sides, wherein upper ends of the spacer bars are inward folded in half to link with a tension mechanism arranged in the middle part through a threaded joint; the lower ends of the spacer bars are inward folded in half, and pressing plates are respectively welded on the upper ends of the spacer bars at the folding part. The tension mechanism is two pull rods respectively connected with the threaded joint and two nuts respectively arranged at end parts of two pull rods, an adjusting screw is arranged between two nuts. External ends of two nuts are respectively provided with a locating plate. The reinforcing device for slab in concrete structure is simple in structure and convenient for construction, which pre-stresses on a carbon fiber cloth that is high in strength and less in deformation, the carbon fiber cloth on which the pre-stress is exerted is applied to reinforcing parts of