Automatic engraving method of metal part

The invention provides an automatic engraving method of a metal part, and is used for full-automatic engraving equipment. The automatic engraving method of the metal part comprises the following stepsthat a conveying device of the full-automatic engraving equipment is controlled to convey the metal part to a preset position; a collecting assembly of the full-automatic engraving equipment is started to continuously scan a first mark and a coding mark on the metal part; a driving device of the full-automatic engraving equipment is controlled to continuously lower the conveying device to a position with a collectable height, so that the collecting assembly can collect the first mark and the coding mark, and the driving device is controlled to stop descending; the first mark is converted intoa second mark, and an engraving zone of the metal part is calculated according to the coding mark; the driving device is controlled to adjust the height of the metal part to the engraving height; andan engraving device of the