With the high proportion of renewable energy connected to the grid, the reliability and quality of power supply have also become an important research topic. Aiming at the power outage problem in disaster situations, the inertia matching control strategy of the mobile diesel generator and the voltage source inverter is studied. The multi-voltage source inertia matching control strategy based on droop control is proposed in this paper. The optimization effect of the inertia matching strategy in transient and steady state is verified by simulation software, which improves the reliability of power supply.