Steel casing device for preventing reinforcement cage from floating upwards

The utility model discloses a steel casing device for preventing a reinforcement cage from floating upwards. The steel casing device comprises a steel casing body, a steel bar circular ring, positioning angle steel and a plurality of fixing combinations, the steel casing body and the steel bar circular ring are coaxially arranged, and the steel bar circular ring is arranged on the steel casing body in a sleeving mode. One end of the positioning angle steel is fixedly connected with the outer wall of the steel casing body, the other end of the positioning angle steel is fixedly connected with the inner wall of the steel bar ring, and the steel bar ring is fixed on the outer wall of the steel casing body through the positioning angle steel; each fixing assembly comprises a D-shaped shackle meeting the national standard, a turnbuckle and a hollow circular tube, and the O-shaped end of each turnbuckle is hinged to the corresponding steel bar circular ring through the corresponding D-shaped shackle. According to t