The invention discloses a control method for a wide-area power generation control system of a pumped storage power station. The pumped storage power station is connected with a regulating end converter station; a hydroelectric generating unit speed governor is connected with the pumped storage power station, receives a unit active command of the pumped storage power station and transmits an actualexecution command to each unit according to real-time operating conditions in the pumped storage power station; a main station selects between a control mode 1 (active power fluctuation control) anda control mode 2 (emergency power control) according to the operating situation. The control method provided by the invention adjusts power output of the pumped storage power station connected to a flexible DC grid to realize optimized operation through measuring real-time output and system frequency of new energy power generation connected to the flexible DC grid, fully exerts the complementary advantages of wind-solar and pumped storage combined power generation, realizes the wide-area power generation control of the flexible DC grid, effectively suppresses the minute-level fluctuation features of wind power and photovoltaic power generation, and achieves friendly delivery.