The invention discloses a control method for improving system damping characteristics of a photovoltaic energy storage power generation system in a multi-power coordinated manner. When a power grid operates normally, the energy storage system can stabilize fluctuations of photovoltaic output power, a photovoltaic grid-connected inverter keeps voltage of a DC bus to be stable, and achieves grid-connected current control. When the power grid fails, the power of the system oscillates since the photovoltaic system has no damping effect on a power system, the drop and recovery of voltage of the power grid can cause drastic fluctuations in the voltage of the DC bus, thereby affecting stable operation of the power grid. The coordinated control method provided by the invention regards DC bus voltage variation as a judging condition, achieves the switching of control modes of the photovoltaic grid-connected inverter and a storage battery during the system oscillating process. The control method can suppress power oscillation of the system, brings convenience for the photovoltaic energy storage power generation system to achieve fault ride-through, and improves system operation stability.