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 comprising a packaging apparatus suitable to package said bars and/or profiles in packs or bundles of a defined weight, said stations being all in line without intermediate interruption points wherein said packaging apparatus (9) is provided with a first shear (10) at the exit of the last rolling stand of said rolling station (6, 7, 8) for cutting directly at commercial length, at rolling speed, still hot bars and/or profiles of indefinite length delivered from the last rolling stand.