The invention relates to a photovoltaic power station static reactive power control method comprising the steps that (1) a grid connection point voltage upper limit value U, a grid connection point voltage lower limit value U, an alarm voltage upper limit value U, an alarm voltage lower limit value U, an inductive power factor lower limit value cosphi and a capacitive power factor upper limit value cosphi of a photovoltaic power station are set, and the photovoltaic power station is partitioned according to actually measured grid connection point voltage U, reactive power Q and power factor cosphi of the photovoltaic power station; (2) reactive power compensation amount deltaQ of the photovoltaic power station is acquired according to an area in which the photovoltaic power station is positioned; and (3) the reactive power compensation amount of each photovoltaic power generation unit of the photovoltaic power station is determined and reactive power compensation is performed on a power grid system according to the reactive power compensation amount. According to the method, safe and stable operation capacity of large-scale photovoltaic power station grid connection operation for power grid voltage is enhanced, and onsite commissioning correct rate of a photovoltaic power station reactive power control system is also enhanced.