Steel bar cutting device for building construction site

The utility model relates to a steel bar cutting device on a building construction site, and belongs to the technical field of building construction. The reciprocating driving assembly is a single-piston type double-outlet-rod hydraulic cylinder, a guiding assembly B for guiding the reciprocating cutting saw blade in a reciprocating mode is further installed on the lower surface of the lifting cross beam, the reciprocating cutting saw blade is arranged below the lifting cross beam in parallel, and the first telescopic end of the single-piston type double-outlet-rod hydraulic cylinder is connected with a steel wire rope A through a tension sensor. The other end of the steel wire rope A bypasses the bend wheel A to be connected with the left end of the reciprocating cutting saw blade, a second telescopic end of the single-piston type double-outlet-rod hydraulic cylinder is connected with a steel wire rope B, the other end of the steel wire rope B bypasses the bend wheel B to be connected with the right end of t