A semiconductor blue laser surgery system, comprising a semiconductor laser light source, the semiconductor laser light source is connected with a medical laser fiber, the semiconductor laser light source is electrically connected with a laser power supply and a control system, the laser power supply and a control system are electrically connected with a laser cooling system, and the laser power supply and The control system is electrically connected with the foot switch. When working, the indicator light source sends out the indicator laser, and the laser enters the optical fiber after; the single-tube semiconductor laser is controlled to emit laser by stepping on the foot switch. The laser enters the optical fiber after shaping and coupling. The working laser and the indicator laser are coupled into a beam of light, enter the medical laser fiber, step on the foot switch, output the laser, and perform Cutting surgery, the present invention can use the characteristic that the blue laser is strongly absorbed by hemoglobin to couple multiple low-power blue lasers into a high-power laser output, it is safe, reliable and has the characteristics of small thermal damage.