The invention belongs to the technical field of mechanical tools, and particularly relates to bolt screwing devices. The bolt screwing device comprises a clamping mechanism, a positioning mechanism, athreaded rod and a universal adjustment mechanism. The clamping mechanism is suitable for being fixedly connected with the part with a bolt. The positioning mechanism and the clamping mechanism are detachably connected. A threaded hole is formed in the middle of the positioning mechanism. The thread pitch of the threaded hole is the same as that of the threaded rod. The threaded rod is matched with the threaded hole, and can move upwards or downwards along the threaded hole. A tool bit is arranged at the first end of the threaded rod, and is matched with the bolt. The universal adjustment mechanism is detachably connected with the second end of the threaded rod, and can transmit torque and drive the threaded rod to rotate. With the bolt screwing device, the problem that a bolt or a screwis difficult to disassemble or assemble after the threads are damaged during screwing can be effectively solved, the situation that a bolt slips in the processing of being screwed up or unscrewed is avoided, and bolts in corners can also be quickly disassembled or assembled. By using the bolt screwing device, an operator can quickly assemble bolts or screws, time is saved, and the working efficiency is improved.