Trimming tool for spiral groove grinding wheel

The invention discloses a trimming tool for a spiral groove grinding wheel. The trimming tool comprises two spiral screw rods and a driving mechanism driving the two spiral screw rods to synchronously rotate, wherein a sliding block which performs reciprocating motion in the horizontal direction under the driving of the corresponding spiral screw rod is arranged on each spiral screw rod in a sleeving manner; forming diamond pens used for performing spiral groove processing on a to-be-processed grinding wheel are fixedly arranged on the sliding blocks; the forming diamond pens and the upper planes of the sliding blocks form included angles; the two spiral screw rods are arranged parallel to the axial direction of the to-be-processed grinding wheel; and the two forming diamond pens are symmetrically arranged on the two sides along the axis of the to-be-processed grinding wheel and synchronously perform bi-directional spiral groove processing on the to-be-processed grinding wheel under the driving of the corresp