Abstract: In order to study the effect of morphology on powder properties, the conventional combined atomization smelting process is improved and optimized. The role of primary atomization stage is further strengthened, the time of droplet spheroidization is prolonged, and the morphology of powder is improved. Spherical powder samples with different particle sizes prepared by the improved combination atomization process and compared with the conventional combination atomization. The results show that the powder prepared by the improved atomization process has the characteristics of good morphology, small specific surface area and low oxygen content. At the same time, the permeability of the improved atomized powder is lower than that of the conventional atomized powder, but the DC bias ability of the magnetic core is significantly improved, and the hysteresis loss and eddy current loss are significantly reduced. ?