A gas atomizing nozzle, including a nozzle body, a gas guide core, a spray nozzle, a lock nut, a processing hole plug, etc., the nozzle body is used to introduce pressurized liquid and gas, and is used as a mounting base for other components, the nozzle The main body divides the gas into two branches; the gas guide core can introduce the gas from the second branch to the nozzle outlet mixing chamber and then spray it out; the injection nozzle is the last part of the nozzle. The spray nozzle sprays out; the lock nut fixes the air guiding core and the spray nozzle to the nozzle main body; the processing hole plug is used to block the outer hole left by processing the inner hole of the nozzle main body. This nozzle is a multifunctional gas atomizing nozzle. The combined structure can change the nozzle into a double-mixed bubble type + pneumatic atomizing nozzle, bubble atomizing nozzle, pneumatic atomizing nozzle, etc. by changing the shape of the parts. The size of the through holes can also achieve different atomization effects.