The invention provides an atomizing nozzle and a hand-hold atomization gas quenching device with the atomizing nozzle, comprising a handle which is internally provided with a gas channel and a liquid channel, and a spraying pipe which is internally provided with a mixed gas channel which is communicated with the gas channel and the liquid channel, and is connected with the handle; the hand-hold atomization gas quenching device is characterized in that: the atomizing nozzle is connected at the end part of the spraying pipe and is provided with a nozzle body with a channel and a rotating head which is matched with the nozzle body and is provided with a cavity and a jet opening; the original way that the gas quenching or the liquid quenching is carried out independently is changed into the way that the gas quenching and liquid quenching are carried out at the same time, thereby having the advantages of liquid quenching and gas quenching; in addition, the device does not need a huge supporting facility and is only matched with a small device, so as to save a great amount of cost and investment for users; in addition, the carrying and usage are convenient, therefore, the hand-hold atomization gas quenching device with the atomizing nozzle is an ideal quenching device.