We explore a novel route to realize non-volatile electron-optical switches. Non-volatile optical switches denotes that only energy is consumed during the memory states transition and no additional energy to maintain the states. This feature allows further advancement of photonics by providing new ways to achieve photonic reconfigurability with ultra-low energy consumption. In this paper, novel non-volatile electron-optical (EO) switches are fabricated on a silicon nitride platform. With the on-chip optical microring resonator (MRR), a non-volatile ON/OFF switch ratio above 30 dB at a single wavelength and a modulation efficiency of 18.7 dB/V are achieved, and the MRR can be switched between under-coupling, critical coupling, and over-coupling states.