Rust removal device for embedded exposed reinforcing steel bars in constructional engineering

The utility model discloses a constructional engineering pre-buried exposed steel bar derusting device which comprises a supporting rod, a transverse plate is fixedly installed at the top of the supporting rod, a motor and a storage battery are fixedly installed at the bottom of the transverse plate, a sleeve is fixedly installed on an output shaft of the motor, and a polishing piece is fixedly installed at the top of an inner cavity of the sleeve. Screw rods are arranged on the two sides of the sleeve in a penetrating mode, and indicating rods are fixedly installed on the upper surfaces of the screw rods. According to the derusting device for the pre-embedded exposed reinforcing steel bar in the constructional engineering, a forward rotating screw rod is arranged, and the screw rod moves towards the center under the action of a nut, so that a box body on a supporting plate moves rightwards, derusting brushes on two cross rods are driven to get close to the center, and therefore the two derusting brushes and