The invention discloses an improved method for installing a reinforcement cage in the beam column joint zone of a reinforced concrete frame structure, which belongs to the building and the structure of the reinforced concrete frame structure in the civil engineering field. The method aims to overcome the problems brought by the traditional installing method, can guarantee the installing quality of the reinforcement cage at the positions of the nodes of beams and columns and creates great convenience for operation. In the detail drawing 3, erecting a bracket above a beam template groove; the longitudinal reinforcements of the beams are interspersed in the longitudinal tendons of the columns and are arranged on the bracket; core zone column stirrups are arranged at the positions of the longitudinal tendons of the columns and between the upper longitudinal tendons and the lower longitudinal tendons of the beams; the longitudinal reinforcements of the beams are fixed by being bonded with the stirrups of the beams; the stirrups of the columns are fixed by bonded with stirrup spacing tringles (B in the drawing 4) to form a reinforcement cage in the beam column joint zone, which is temporarily arranged exactly above the beam column joint zone and the beam template groove and is not bonded with the longitudinal tendons of the columns; finally, the beam reinforcement cage and a column stirrup cage integrally slide into the beam template groove and the beam column joint core zone along the longitudinal tendons of the columns; and therefore, the final position of the reinforcement cage in the beam column joint zone is realized.