When VSC-HVDC system is applied in wind power integration and long-distance transportation, low voltage ride-through (LVRT) in power grid fault is the main technical problem. A LVRT coordinated control strategy is proposed for the VSC-HVDC based wind farms. During LVRT period, the HVDC converters provide reactive current to the grid and control the output power of wind farm through the quick power reduction method which is based on frequency control, to maintain the power balance of DC system. The wind turbine power control is improved and hierarchical control is designed to make it in harmony with the HVDC control and keep the voltage stability of the wind turbines. Coordinated control strategy without communication connection between HVDC system and wind farms, without increasing investment in equipment, has a good economy. Results of case simulation verify the quickness and effectiveness of the proposed method.