The invention provides a coordinated control method for active power of a photovoltaic power station group. The method includes the following steps: firstly, acquiring a maximum allowable photovoltaic power generation output value Pmax of a power network; secondly, acquiring planed total output amount Pn_plan of the photovoltaic power station group; thirdly, regulating a planned output value Pi_plan of each photovoltaic power station; fourthly, acquiring the planned output value Pi_plan of each photovoltaic power station. Compared with the prior art, the coordinated control method for the active power of the photovoltaic power station group has the advantages that on the premise that the power network operates safely and stably, output plan of each photovoltaic power station is optimally configured in consideration of a principle of equality according to actual resource situation of each power station, and accordingly photovoltaic power generation output is maximized.