Visual precise positioning device of screen printing machine

The utility model relates to the technical field of screen printing machines, in particular to a visual accurate positioning device of a screen printing machine, which comprises a whole device, an adjusting mechanism and a positioning mechanism, the top of the back of the whole device is movably connected with the adjusting mechanism, and the periphery of the adjusting mechanism is fixedly connected with a transverse block. A servo motor is fixedly connected to the middle of the interior of the transverse block, a transmission lead screw is movably connected to the top of the servo motor, a connecting ring is movably connected to the periphery of the transmission lead screw, connecting rods are movably connected to the two sides of the connecting ring, and positioning mechanisms are movably connected to the bottoms of the connecting rods. The transmission lead screw is driven to rotate in the mode that the servo motor is manually controlled to operate, the height of the connecting ring is indirectly changed,