Method for tracing DM two-dimensional code on printed circuit board

The invention belongs to the technical field of printed circuit board production and processing, and particularly relates to a method for tracing a DM two-dimensional code on a printed circuit board, which comprises the following steps of: when a DM two-dimensional code hole is generated, deleting an L-shaped boundary positioning hole for positioning an image on the basis of a standard DM two-dimensional code; and generating a DM two-dimensional code of the L-shaped boundary positioning hole which is not used for positioning the image to drill a DM two-dimensional traceability code hole. According to the method for tracing the DM two-dimensional code on the printed circuit board, an L-shaped boundary positioning hole for positioning an image is deleted, other holes are reserved, and the DM two-dimensional code without the L-shaped boundary positioning hole is generated, so that when the DM two-dimensional code hole without the L-shaped boundary positioning hole is drilled on the printed circuit board, the num