Fixing method for shaft part punching points

The invention discloses a fixing method for shaft part punching points. The method comprises the following steps that step 1, three plunger chips (3) are arranged on movable sliding blocks (2) located on a three-jaw claw disk (1); step 2, a part A (4) is enclosed in the three-jaw claw disk (1); step 3, one end of a part B (6) is place in the part A (4); step 4, the other end of the part B (6) is held by one person, and the person uses the other hand to pull a movable sliding block twist spanner to enable the three sliding blocks (2) to punch points and closing an opening together towards the center part B (6). The fixing method for the shaft part punching points has the advantages that positions of the punching points are distributed evenly, the force bearing is even, the structure is simple, the use is convenient, and the labor force is reduced.