Metal laser marking machine is a laser beam at the surface of a variety of materials marked with a permanent marker. Marking effect is exposed underlying material surface material by evaporation, or by light energy cause chemical and physical surface material becomes "carved" out of the traces, or by burning part of the light material, showing the required etching graphics, text. Metal laser marking characteristics: (1) the vast majority of metallic or non-metallic materials for processing. (2) laser is a non-mechanical "tool" for processing, the material does not produce mechanical compression or mechanical stress, no "tool" worn, non-toxic, rarely cause environmental pollution. (3) the laser beam is very small, so that the work material is consumed little. (4) the processing, will not produce X-ray image processing methods such as electron beam, it will not interfere with the electric and magnetic fields by. (5) simple operation, the use of computer numerical control technology enables automated processing, can be used for high-speed production line of parts and components efficiently processing, can be used as part of a flexible manufacturing system. (6) Use Precision workstations can fine micromachining. (7) using microsurgical system or camera system, capable of being processed surface conditions were observed or monitored. (8) may pass through the light-transmitting material (e.g., quartz, glass), for processing its internal components. (9) may be a prism, a mirror system (for Nd: YAG laser with a fiber optic light guide system also) will gather the light beam to the inner surface of the workpiece or inclined surface for processing. (10) capable of marking a bar code, figures, characters, patterns and other signs.