Rotary alignment clamping device for shackling-unshackling back-up wrench for workover treatment sucker rod and using method

The invention relates to a rotary alignment clamping device for a shackling-unshackling back-up wrench for a workover treatment sucker rod and a using method. According to the technical scheme, the rotary alignment clamping device comprises a rotating base disc assembly, a guide clamping assembly, a lever type stress application assembly, a pull rod type displacement sensor assembly, a rotating power assembly and a control assembly, the rotating base disc assembly comprises an opening base disc and a plurality of rollers, the rollers are installed at the original back-up wrench position of a power wrench, and the opening base disc rotates through the rollers; clamping blocks of the guide clamping assembly move front and back in a guide rail, and the two clamping blocks clamp a spanner square diameter; and clamping sliding blocks are arranged at the front ends of the clamping blocks and can move relative to the clamping blocks. The rotary alignment clamping device has the beneficial effects that the rotary ali