The utility model provides a structural joint crack department maintenance application rust cleaning instrument, includes the steel bistrique that comprises bistrique section, junction and handle section, the external screw thread that the hoop distributes is worn to the bistrique segment table of steel bistrique, and the diameter of bistrique section reduces, and bistrique section bottom flushes with the junction. The utility model discloses a carry out construction improvement with conventional steel bistrique, increase the external screw thread at steel bistrique surface, multiplicable surface treatment area of contact, surface treatment is effectual. The utility model discloses still through reducing steel bistrique diameter size for the steel bistrique more is suitable for structural joint crack department, and can make surface treatment more thoroughly. 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.