Applications And State-of-the-Art Development of Water-Jet Guided Laser Machining Technology Water-guided laser technology combines laser beams with high-pressure water jets to achieve high-precision, efficient, and low-thermal-damage material processing. It is widely applied in aerospace, semiconductors, and the new energy sector, especially where precision and material integrity are critical. Though the technology still faces challenges in jet stability, coupling efficiency, and environmental requirements, both domestic and international development efforts are driving its rapid advancement.