The utility model relates to a steel bar fixing device suitable for reinforced concrete extracts experiment, the reinforced concrete mould outside is equipped with U type mount, and the reinforced concrete mould is placed in U type mount, and the screw has been offered to the both sides wall bottom symmetry of U type mount, all is equipped with the positioning bolt who is used for fastening the reinforced concrete mould in the screw, and the breach that is used for holding the reinforcing bar is all offered on the both sides wall top of U type mount, all installs the reinforcing bar fixation clamp on the both sides wall of U type mount. The utility model discloses be equipped with U type mount and be in the same place with U type mount is fixed through positioning bolt outside the reinforced concrete mould, and be equipped with the reinforcing bar fixation clamp on the lateral wall of U type mount, just so realized that the reinforcing bar is fixed with the location with the zonulae occludens of reinforced concrete mould, pouring, the in -process vibrates, the reinforcing bar can not change with the relative position of mould, the position of reinforcing bar will be the same with the position of design in the fashioned test piece, to the precision that improves the tentation data highly significant.