The utility model provides a forced positioning device for an embedded hole of a support. The mounting structure comprises an outer frame, longitudinal beams, cross beams and mounting pipes, the crossbeams and the longitudinal beams are arranged in the outer frame in a crossed mode, the intersection points of the longitudinal beams and the cross beams are the center point of the section of the outer frame, the cross beams and the longitudinal beams enable the interior of the outer frame to form four installation cavities in a surrounding mode, installation pipes are arranged in the installation cavities respectively, and the center axes of the installation pipes correspond to the center axis of the support foundation bolt. According to the forced positioning device for the embedded hole of the support, the relative position precision of the whole center of the support foundation bolt is improved; and when the axes of the large mileage support and the small mileage support on the small-radius curve top cap are fan-shaped, the positioning device is adopted, so that the relative distance of the foundation bolts of the supports is more accurate, construction is facilitated, finally, accurate erection of the T beam or the box beam is guaranteed, and meanwhile, help is provided for judging whether the line type of a finished bridge after the T beam or the box beam is erected conforms to the design or not.