The invention relates to a 
metal powder preparation device and method therefor. The device comprises an atomization furnace, a heater, a cooler, an atomization chamber, an atomizer, a pneumatic classifier, a middle bin, a sieving funnel, a screening 
machine, a deduster, a balance tank, a shell-and-tube 
heat exchanger, a vacuum obtaining device, a 
control system, an infusion tube, a conduit, a pipeline, a gas channel, a pneumatic 
butterfly valve, an 
electromagnetic valve and the like. The method comprises 
atmosphere preparation, 
metal smelting, infusion, centrifugal atomizing, pneumatic classification, 
mechanical screening, gas purification, cooling and the like, the 
metal is smelted and treated so as to be poured onto the atomizer for centrifugal atomization to form 
powder, the 
powder is classified by the pneumatic classifier, after classification, rough powder is screened by the 
mechanical screening so as to obtain the finished powder, 
fine powder is sent into the deduster by 
airflow for purification, the purified gas is driven by a 
high pressure centrifugal fan so as to be speeded up to be atomized and classified again after being subjected to heat exchange through the shell-and-tube 
heat exchanger. The device can be used for 
continuous production of spherical powder below -320 meshes, and the 
oxygen content is less than or equal to 80ppm.