Holmium laser treatment machine, the most advanced equipment in the treatment of urinary stones internationally today, was introduced and put into clinical use in the Department of Urology of Tianjin Tianhe Hospital. Holmium laser is a new type of solid-state pulsed surgical laser with rare metal holmium as the excitation medium, which can produce wavelength 2.1um light wave with high energy in water to achieve efficient stone crushing through the micro-blasting effect of water molecules on stones. It is now widely used in developed countries internationally for the treatment of urinary tract stones. Holmium laser can be transmitted through the laser fiber, which is only 600 microns in diameter, and the stones can be crushed through the endoscope. Therefore, no incision is needed for patients with ureteral stones, saving patients from the pain of open surgery and greatly reducing hospitalization time. Because the penetration depth of Holmium laser to soft tissues is less than 1mm, the damage to normal tissues is extremely small, which greatly improves the safety of treatment. Because the holmium laser uses an endoscope to treat stones through the natural channels of the human urethra and ureter, the damage is even less than that of extracorporeal shock wave lithotripsy, making it a truly non-invasive treatment. Because Holmium laser also has the function of vaporizing and cutting soft tissues, through the endoscope, it can also excise and incise tumors of the urinary system such as bladder, urinary tract strictures and polyps.