The invention discloses a fabricated steel-frame structure joint which comprises a joint core. The joint core comprises an upper end plate, a lower end plate, an upper end connector, a lower end connector, a circumferential connector and a core column; the upper end plate is fixedly arranged on the upper end face of the core column, and the lower end plate is fixedly arranged on the lower end faceof the core column; the upper end connector is fixedly arranged on the upper surface of the upper end plate, and the lower end connector is fixedly arranged on the lower surface of the lower end plate; a box column comprises an upper box column and a lower box column, and the box column sleeves the upper end connector and the lower end connector and is connected with the upper end connector and the lower end connector through bolts; one end of the circumferential connector is fixedly connected with the side wall of the core column, and the other end of the circumferential connector is connected with one end of a truss frame beam through bolts. By arranging the joint core, rigid connection between a steel-frame beam structure and a column structure is realized, the structure is simple andreasonable, the force transmission is clear, the fabrication speed is high, and the construction quality is high.