Abstract: A system for wall to wall connection for precast shear walls includes a plurality of horizontal and vertical reinforcement bars configured within the precast shear wall. The system also includes a plurality of connecting tubes fixed between the spacing provided between the reinforcement bars, a plurality of openings provided between the plurality of connecting tubes, a plurality of grout tubes fixed above the plurality of openings to grout the openings after completing confection of the shear walls, a plurality of connecting bars capable of being inserted within the connecting tubes of the precast shear wall, when erected, a connecting device for inserting through the openings to grip the connecting bars, and a driving device to supply power to the drive for causing rotation of the drive/manual action and, thereby, sending the connecting bar in a translational motion from the first shear wall to the second shear wall.