The invention relates to a controls strategy of a distributed photovoltaic energy-storage micro grid. The control strategy comprises that in the grid-connected state, the micro grid runs in a network manner, a battery energy-storage system works in a power constant control mode, when an active switching instruction is received, the power of the battery energy-storage system is adjusted, the micro grid is disengaged from the power grid and runs independently, and a micro-grid system executes an off-grid operation control strategy; meanwhile, the battery energy-storage system works in a voltage/frequency-constant control mode; and when a grid-connected instruction is received, the micro grid and the power grid run in the networked manner, the battery energy-storage system works in a PQ mode, and the micro-grid system executes a grid-connected operation control strategy. Self intermittence and fluctuation of distributed photovoltaic power generation can be alleviated, and the access capability and the grid-connected electric energy quality of distributed photovoltaic power generation are improved.