A virtual inertial adaptive control strategy is proposed for bidirectional DC/DC converters of electric vehicles. In order to improve the frequency stability of the microgrid, the converter of AC/DC hybrid microgrid connected by electric vehicles is controlled by the virtual synchronous generator technology. Then, the virtual inertia adaptive control is adopted for the electric vehicle bidirectional DC/DC converter, which can provide the inertia support for the voltage of the DC network. It can also restrain the DC voltage change too fast when the load fluctuates, and the voltage can be quickly restored to the rated value when the load fluctuation disappears. Finally, a AC/DC hybrid microgrid model containing electric vehicles is built and simulated in PSCAD/EMTDC. The simulation results verify the effectiveness of the proposed control algorithm. This work is supported by National Natural Science Foundation of China (No. 51507050) and Science and Technology Project of Jiangsu Electric Power Company (No. J2017025).