A stiff structure formwork bolt pull rod connecting piece comprises a pull rod bolt, a tapered transitional connecting nut and a stud of a stiff structure, the other end of the pull rod bolt is connected with an inserting and hanging connecting component, and the inserting and hanging connecting component is connected with the stud in an inserting and hanging mode. The inserting and hanging connecting component is formed by welding an inserting and hanging plate to the lower face of the rear end of an upper face plate, welding a pull rod bolt connecting plate to the lower face of the front end of the upper face plate, and welding reinforcing bars between the two sides of the inserting and hanging plate and the two sides of the pull rod bolt connecting plate respectively. A containing space for the stud head of the stud is formed by an empty area between the inserting and hanging plate and the pull rod bolt connecting plate. An inserting and hanging hole formed by a large-diameter round hole and a small-diameter semi-round strip-shaped hole is formed in the inserting and hanging plate. A fixed stiff structure formwork is connected through the existing technology, and is connected with the stud in a steel web plate in the stiff structure through the inserting and hanging connecting component in an inserting and hanging mode. The welding sequence of the pull rod bolt and the stud in the traditional stiff structure formwork supporting operation is omitted, a large number of work hours is saved, and the engineering construction progress is accelerated.