The invention relates to a
metal powder preparation method and device based on DC (
Direct Current) resistance heating non-contact
smelting. The
metal powder preparation method comprises the following steps: enabling one end of a
metal rod to pass through an electrified
graphite area at a uniform speed; heating to melt the metal rod in the electrified
graphite area; continuously forming metal liquid drops from
molten metal under the action of the gravity; continuously dripping the metal liquid drops to a gas atomization area; impinging and scattering the metal liquid drops by high-pressure and high-speed inertial gas in the gas atomization area, and cooling to form
metal powder. The
metal powder preparation device comprises a vacuum cavity, a pair of idler wheels and a
graphite pipe, wherein the two idler wheels are parallel in the axial direction, the rotation directions of the idler wheels are opposite, and a gap between rotating surfaces of the two idler wheels is matched with the
diameter of the metal rod; the gap between the rotating surfaces of the two idler wheels is communicated with a metal rod outlet; one end of the graphite
pipe is connected with the metal rod outlet, and the other end of the graphite
pipe is sequentially connected with a gas atomization
nozzle and a
powder collector. According to the
metal powder preparation method and device, the flow velocity of
molten metal liquid can be stably controlled, and the industrial production demands can be met.