The utility model provides a steel construction reentrant corner face maintenance application rust cleaning instrument, includes the steel bistrique that comprises bistrique section, junction and handle section, it has wave - shaped steel wire to follow length direction evenly distributed around the bistrique section of steel bistrique, and the steel wire lower extreme is fixed by staple bolt and junction, the bistrique section of sending forth on the steel wire. The utility model discloses a carry out construction improvement with conventional steel bistrique, it is rotatory through increasing the steel wire at steel bistrique surface, multiplicable surface treatment area of contact. In machinery is high -speed rotatory, rotate through steel bistrique and steel wire, the dead angle region that can handle the reentrant corner face, and the surface treatment roughness can reach " the anticorrosive application of public road bridge girder iron structure " desired ST3 level standard of polishing, can reach the effect of two kinds of instruments with an instrument to improve the work efficiency more than 1.5 times. The utility model is simple in operation, the professional utensil of available conventionality is fixed and is dismantled, is a novel surface treatment instrument that is suitable for bridge maintenance application.