3D large format laser engraving machine is widely used in the field of automotive interior and exterior decorative parts, which helps to highlight the brand characteristics and make each car more personalized. Buttons, gear handle housing, steering wheel, center control panel, ambient lighting, interior strips, bumpers, grills, logos, lights, lampshades, etc., often use laser processing process on the surface of the workpiece to etch stripes, patterns and so on. Most of these workpieces present complex curved surface form, through the use of laser and 3D dynamic focusing system technology, can realize three-dimensional large surface complex workpieces one-time complete etching, to achieve the texture, hollowing out and translucent effect, visually more advanced sense of elegance and atmosphere.