Positioning device capable of improving drilling precision and consistency of spinning barrel

The utility model provides a positioning device for improving the drilling precision and consistency of a spinning cylinder. The positioning device comprises a bottom plate, a positioning block is arranged on the bottom plate; a limiting block is arranged at the left end of the positioning block; the limiting block is connected with the guide rod; the other end of the guide rod penetrates throughthe positioning block and is connected with a positioning disc; a first supporting block is arranged at the upper end of the bottom plate; a first push rod assembly is arranged on the first supportingblock; a wedge block is arranged at the end, close to the bottom plate, of the first push rod assembly. A drilling assembly is arranged on the bottom plate on the right side of the first push rod assembly; a hoop assembly, a second supporting block and a third supporting block are sequentially arranged at the lower end of the bottom plate from left to right. A second push rod assembly is arrangedat the end, away from the