The invention belongs to the technical field of iron removal from silicon carbide micro powder, and provides a method for removing iron ions from silicon carbide micro powder by a complexing agent. The method comprises the following steps of mixing and stirring the silicon carbide micro powder and de-ionized water according to the proportion; adding a certain quantity of complexing agent active ingredients into per kilogram of silicon carbide micro powder; performing stirring and ultrasonic oscillation for reaction; after the stirring is completed, performing suction filtration; flushing filter cake by the de-ionized water until the pH value is near the neutral state; drying the filter cake in a heater until the water content requirement is met; performing discharging and crushing; obtaining the silicon carbide micro powder with the qualified iron content. The used complexing agents are common chemical raw materials; the addition is little; the concentration in the filter liquid is low; the pollution is low; the biodegradation is easy; the washing water consumption is small; the environment pollution is low and the cost is low.