The utility model relates to a rebar wrench which consists of a steel sleeve and a smooth and round rebar, wherein the smooth and round rebar is attached onto the exterior wall of the steel sleeve and is welded with the steel sleeve. In order to quickly bind a stirrup in place when constructing a structure baseboard, a floor or a large-size beam column of a building, a closed portion of the stirrup is usually processed into a straight section, but not bent to form a normative hook shape of 135 degrees. The rebar wrench is capable of conveniently bending the straight section of the stirrup to form the hook of 135 degrees.