The invention provides a control method and device for a static reactive power compensation device for a wind turbine. The method comprises the steps that whether the power factor at a grid connectionpoint of the wind turbine satisfies a first predetermined requirement is determined; if the power factor does not satisfy the first predetermined requirement, whether the reactive power at the grid connection point satisfies a second predetermined requirement is determined; if the reactive power does not satisfy the second predetermined requirement, whether the duration of the reactive power which does not satisfy the second predetermined requirement is greater than or equal to a predetermined threshold; and if the duration is greater than or equal to the predetermined threshold, one or morecapacitor banks are switched. According to the SVC control method and device for the wind turbine, SVC is used for reactive power regulation, which can stabilize the voltage at the grid connection point of the wind turbine, and can adjust the reactive power; the power factor is improved; reactive power loss and overall power consumption during the operation of a wind power plant are reduced; overall investment and economic losses are reduced; and stable and safe operation of a power grid and the wind turbine is ensured.