Compact plant for continuous production of steel bars and/or profiles from liquid steel, incorporating a steel plant station, a continuous casting station (3) suitable to cast billets, a rolling station (6, 7, 8) directly linked to the continuous casting station (3), a finishing station placed at the exit of the last rolling stand of said rolling station characterized in that said finishing station comprises a compact packaging apparatus (9) suitable to cut, at rolling speed, bars and/or profiles of indefinite length directly at commercial length, and suitable to package said bars and/or profiles in packs or bundles of a defined weight, and in that said stations are all in line without intermediate interruption points.