The invention relates to an atomizer which adopts a new atomizing way and a new atomizing principle and sufficiently utilizes fluid motion and vortexes to enable materials and gases to be automatically absorbed to the vortexes from a vortex center area, uniformly mixed by being influenced by the vortexes in the moving process from a vortex center to vortex periphery and thrown out from the atomizer under the action of circular motion centrifugal force to form aerial fog. The atomizer comprises a power machine and a rotating shaft, wherein the rotating shaft is provided with an atomizing chamber, the middle of the atomizing chamber is provided with a gas inlet, and the periphery of the atomizing chamber is provided with a gas outlet. The invention can be used for various fields needing atomizing equipment, can be used for producing the powder of multiple nano materials and can be applied to fields, i.e. material industry, atomizing cooling, smoke gas purification, atomizing drying, refining oil and heavy oil catalytic cracking, chemical reaction, fuel atomization, heavy oil atomization, boiler water deoxygenation, atomized water, pesticide spraying, extinguishment spraying, humidification, sterilization, odour removal, fog making, medicine preparation, medical treatment, chemical industry production, and the like.