The invention relates to the field of photovoltaic power generation application, and discloses a distributed photovoltaic power generation active scheduling method and system. The service life of an inverter is prolonged and the robustness of the system is guaranteed while current harmonics are minimized, the stop devices are prevented from being affected with damp and the fatigues of the devicesare balanced. The method comprises that distributed photovoltaic power generation grid-connected interface equipment resolves a power instruction sent by a grid scheduling system to obtain a power setvalue required by a grid; when the power set value is smaller than the maximum active power output value of a distributed photovoltaic power generation system and satisfies the condition that two inverters having minimum output power stop to rest in a time division manner, and the distributed photovoltaic power generation grid-connected interface equipment controls part of the inverters in an inverter unit by adopting a cyclic turbine algorithm according to the power set value to work in an approximately full power state, at least one inverter stops to rest; and the control on the inverters simultaneously satisfies a condition that the variance of the cumulative running time of each inverter is minimum, an active scheduling constraint condition and an optical power constraint condition.