The utility model belongs to the field of bolt assembly. The turnbuckle body foundation bolt assembling device comprises a base, the problem that existing foundation bolt manual assembly is low in efficiency is solved. Proposed now is the following scheme, the device comprises two vertical rods, a cross rod I and a cross rod II are welded between the two vertical rods; the cross rod I is positioned below the cross rod II; a control box is mounted on the cross rod I; a motor is mounted at the top of one vertical rod; an output shaft of the motor is connected with a clamping device; fixed rods are symmetrically welded on the upper surface of the cross rod II; a movable plate is connected between the two fixed rods in a sliding manner; a first threaded hole is formed in the middle of the movable plate, a first screw is in threaded connection with the interior of the first threaded hole, and supporting rods are symmetrically welded to the upper surface of the movable plate. The turnbucklefoundation bolt assembling device is novel in design, greatly improves assembling efficiency, relieves workloads, can assemble turnbuckle foundation bolts of different sizes, and is high in applicability and worthy of popularization.