Water-jet guided laser machining device and method under multiple combinations of water and air

A water-jet guided laser machining device under multiple combinations of water and air, wherein the water-jet guided laser machining device comprises a laser-water coupling device, an annular water-jet device, a nozzle, an annular liquid nozzle, and an auxiliary atmosphere input line,

• the auxiliary atmosphere input line is arranged between the laser-water coupling device and the annular water-jet device, an auxiliary atmosphere input through the auxiliary atmosphere input line 9 is sprayed from an annular gas nozzle to form an auxiliary airflow layer, the nozzle is arranged at a lower end of the laser-water coupling device, the annular liquid nozzle is arranged at a bottom of the annular water-jet device, the laser-water coupling device is configured for coupling a laser beam with an internal liquid to spray a single water jet from the nozzle, the annular water-jet device is configured for spraying the internal liquid from the annular liquid nozzle to form an annular water curtain around a laser guiding water jet, and the auxiliary airflow layer is enclosed in the annular water curtain.