3D printing metal powder is an important raw material for 3D printing of metal parts. Currently, the main 3D printing powder materials include cobalt chromium alloy, stainless steel, industrial steel, bronze alloy, titanium alloy, and nickel aluminum alloy. 3D printing of metal powder requires good plasticity, meeting the requirements of small particle size, narrow particle size distribution, high sphericity, good fluidity, and high loose density.