Visual positioning screw machine

The utility model discloses a visual positioning screw machine, which belongs to the technical field of screw machines, and comprises a case, the top of the case is fixedly connected with a workbench, the top of the workbench is fixedly connected with a sliding table, the outer surface of the sliding table is movably connected with a sliding sleeve, the top of the sliding sleeve is fixedly connected with a placing table, and the placing table is fixedly connected with the workbench. By arranging a threaded rod, a rotating block, a rotating sleeve, a push plate, a sliding rod, a pressing plate and a reset spring, when a workpiece needs to be fixed, the workpiece is placed in the middle of the containing table, the threaded rod in the fixing block is rotated, the rotating block rotates in the rotating sleeve, and therefore the push plate is pushed to extrude and fix the workpiece; the pressing plate is lifted upwards along the sliding rod, one end of the pressing plate is pressed on the upper surface of the wor