Electric fastening bolt device applicable to multiple calibers

An electric fastening bolt device suitable for multiple calibers comprises a workbench, a fastening mechanism is arranged above the workbench, the fastening mechanism comprises a connecting plate, a rotating rod, a worm gear, a worm, a driving motor, a rotating plate, an electric telescopic rod, a pushing block, a sliding block, a stress block, a connecting rod and a clamping block, and the rotating rod penetrates through the interior of the connecting plate; movement of a pushing block is controlled through an electric telescopic rod, so that a stress block of the pushing block moves, finally, two sets of clamping blocks are driven to move relatively through a connecting rod, bolts with different calibers can be fixed conveniently, rotation of a worm gear is controlled through rotation of a worm, finally, a rotating rod pushes a rotating plate to rotate, and the bolts and nuts are fastened. By arranging the three sets of fastening mechanisms, a plurality of sets of bolts and nuts can be fastened, the nuts an