Abstract:An automatic identification system of a horizontal machining center workbench was introduced. Using the system, workbench could be automatically identified, NC system could automatically call corresponding procedures for processing according to the identifying information, thus the machining efficiency was improved. This system is simple and reliable, has high degree of automation, can be used to improve the efficiency as well as avoiding artificial error. Due to high precision and high stability of laser, the system can adapt to more workbench identification.