Steel structure embedded part and construction method of reinforcement cage

The invention discloses a steel structure embedded part and a construction method of a reinforcement cage, the steel structure embedded part is used for supporting the reinforcement cage, the reinforcement cage is provided with an assembly space, the steel structure embedded part comprises a first supporting column, a second supporting column and a third supporting column, the first supporting column is embedded into the reinforcement cage, and the first supporting column is located in the assembly space; the first supporting plate is connected with the first supporting column, the first supporting plate is located outside the assembling space, and the first supporting plate abuts against the reinforcement cage; the second supporting plate is connected with the first supporting column, the second supporting plate is located in the assembling space, and the first supporting plate and the second supporting plate are oppositely arranged; the anti-shearing assembly is arranged in the assembling space, the anti-sh