Positioning adjuster

The invention relates to the field of positioning adjustment, in particular to a positioning adjuster. The positioning adjuster comprises a ring body, and further comprises a tension control device, an adjusting spring, a positioning iron core and a positioning ball; gaps or through holes are formed in the inner and outer sides of the ring body; the positioning ball is arranged on the gap or the through hole on the outer side of the ring body; one end of the adjusting ring butts against the gap or the through hole on the inner side of the ring body, and the other end is connected with the positioning ball through the tension control device; and the positioning iron core sleeves the inner side of the adjusting spring. The positioning adjuster controls tensioning of the adjusting spring through the tension control device, and can quickly adjust the extension distance of the positioning ball in the ring body, so that the ring body is suitable for embedding in objects with different diameters and suitable for dif