Abstract: The effects of the electrode induction gas atomization parameters (atomization pressure, gas temperature, and melting power) on the particle size distribution, powder fluidity, and yield of the new high hardness martensitic iron-based alloy powders were studied by orthogonal test. The results show that, the particle size distribution is mainly affected by the atomization pressure, while the fluidity and yield of the powders are affected by the atomization pressure and the gas temperature. When the atomization pressure is 1.5 MPa, the melting power is 15 kW, and the atomization gas temperature is 40 ℃, the powders have the largest powder yield, the mass proportion of powders with the particle size of 53~180 μm accounts for 68.24%, and the powders show the well powder fluidity, the standard deviation of powder size distribution, and the best powder morphology.