Auxiliary marking fixing device

The utility model belongs to the technical field of machining, and discloses an auxiliary marking fixing device which comprises a vertical plate (2), a bottom plate (4), a supporting block (6) and a fixing pin (7). The bottom plate (4) is fixedly arranged on a marking workbench, the vertical plate (2) is perpendicularly and fixedly arranged on the top face of the bottom plate (4), and the two supporting blocks (6) are symmetrically arranged on the top face of the bottom plate (4) and fixedly connected with the vertical plate (2). The opposite faces of the two supporting blocks (6) are arranged to be inclined faces, and the two inclined faces make contact with the cylindrical side face of a marked part. The vertical plate (2) is provided with a round hole which is consistent with an end face hole of a marked part in position, and one end of the fixing pin (7) penetrates through the end face hole of the marked part and is arranged in the corresponding round hole in the vertical plate (2). The marking device is