The invention discloses a non-oriented silicon steel for a rotor and a production method thereof. The steel consists of the following components in percentage by weight: 0.001-0.004% of C, 2.5-4.0% of Si, 0.5-1.5% of Al, 0.10-1.50% of Mn, not more than 0.02% of P, not more than 0.001% of S, not less than 4.1% and not more than 6.0% of Si+Al/2+Mn, not more than 0.002% of N, not more than 0.005% of B and the balance of Fe and inevitable impurities. The production method mainly comprises the following steps of: refining process, namely sequentially deoxidizing Si and Al, and finally, adding CaSi alloy for Ca treatment; heating a casting blank in a heating furnace to be 1100 DEG C, insulating and then rolling; normalizing, carrying out acid cleaning and cold rolling, wherein the reduction rate is 70-78%; and tensioning and annealing a belt, wherein the temperature is 920-980 DEG C, and the tension is controlled between 0.5MPa and 1.5MPa. By utilizing the method, electrical sheets with excellent electromagnetic property, yield strength and fatigue performance can be obtained, the annealing temperature is reduced, the production energy consumption can be decreased, and furthermore, the production cost is lowered.