To improve the reciprocity of the system and effectively suppress the influence of backscattering noise on resonant micro-optical gyroscope (RMOG) detection accuracy, an optical switch-based RMOG is proposed. First, we analyze and test the influence of backscattering noise in the actual RMOG system; the same frequency modulation is performed on both clockwise and counterclockwise lightwave signals, which are time-division multiplexed using a 1×2 optical switch to alternate the laser output between clockwise and counterclockwise separating the signal and backscattered light in time and reducing the influence of backscattering noise on RMOG detection accuracy; furthermore, the channel crosstalk of the optical switch and the effect of switching time on backscattering noise are analyzed. The experimental results show that the optical switch can reduce the backscattering noise, and the degree of reduction is limited by the switch crosstalk. The switching time of the switch needs to be optimized for the time constant of the optical waveguide-ring resonator and the loop lock time.