The invention relates to a method for producing PMMA-based antistatic nano fiber. The method comprises the following steps: weighing 25-30% of PMMA (mass fraction, same below), 5-6% of beta-CD and 1.25-1.5% of CNTs, and dissolving the materials in a DMF solvent, performing magnetic stirring for 12 h, performing ultrasonic concussion for 2 h at room temperature, performing static spinning on spinning liquid, adjusting the flow amount of the spinning liquid to 0.55-0.75 mL/h, wherein the applied voltage is 20-22 kV, the reception distance is 21-25 cm, horizontally putting a static spinning apparatus in a fuming cupboard, and performing static spinning at the room temperature to obtain the PMMA-based antistatic nano fiber. The production method has the beneficial effects that the synthesis technology is simple, the reaction condition is mild, production cost is low, and repeatability is good, film forming ability of PMMA is improved by beta-CD, and CNTs is modified, and the composite nano fiber by taking PMMA as a main part is obtained.