For low voltage ride through issue of the micro-grid system, a coordinated control of low voltage ride-through (LVRT) is proposed for the photovoltaic/battery micro-grid system. During low voltage of the system, the photovoltaic system tracks maximum powerpoint of PV panels and the battery system maintains the constant of the DC bus voltage. When power output of the battery system has reached its limit, the photovoltaic system adopts the constant voltage control strategy to ensure a stable voltage. Considering the load fluctuation of micro grid, a current limit control strategy with the function of reactive compensation is proposed. This strategy can provide voltage support for grid side and avoid overcurrent of the converter output. The simulation results show that the solar energy is fully used, the DC bus voltage is maintained at a constant level, the overcurrent of the converter output is avoided and the system voltage is supported by the reactive power from the inverter. The aim of LVRT is realized and the effectiveness of the control strategy is verified.