Seal stone micro-carving is a traditional art project in the fifth batch of representative projects of municipal intangible cultural heritage. It has a history of about 190 years. During the production, a magnifying glass can only play an auxiliary role. The stone powder is everywhere where the knife is used, and it is impossible to judge visually. The knife moves based on experience and feeling. The slightest mistake may lead to failure. The process is complicated, and at least seven processes are required: material selection, grinding, polishing, carving, coloring, cleaning, and waxing.