Rotary blank locating device

The utility model provides a rotary blank locating device which comprises two servo motors, a servo motor base, a cylinder, a fixed plate, two guide pillars, two deflector rods, a guide pillar fixing plate and two flanges, wherein the fixed plate is locked on and attached to the tops of the two guide pillars; the servo motor base sleeves the two guide pillars in a way of sliding up and down; the guide pillar fixing plate is locked on and attached to the bottoms of the two guide pillars; the cylinder is arranged on the fixed plate; a piston rod of the cylinder is connected with the servo motor base by a floating connector; the two servo motors are both arranged on the servo motor base; shafts of the servo motors are both connected with the flanges; each flange is also connected with the deflector rod by a movable pin. After the rotary blank locating device is used, bottle blank tooth mouths of two blank head base devices can be moved at the same time, and accurate and automatic locating can be realized, so that the production quality and automatic production level are improved and the production speed is accelerated.