The invention discloses a real-time photovoltaic power station power fluctuation stabilizing method for a lead-carbon battery. Not taking energy storage service life into full consideration, the existing fluctuation stabilizing method can provide photovoltaic change satisfaction rate; however, the energy storage service life is severely shortened. The invention initially provides an improved energy storage service life model of the lead-carbon battery; the real-time photovoltaic power station power fluctuation stabilizing method based on the model is proposed; when photovoltaic power variation rate exceeds power fluctuation constraint, a target variation rate is regulated to be an adaptive inverse proportional function which is associated with the energy storage state of charge and photovoltaic power variation rate based on energy storage; when the photovoltaic power variation rate is less than the power fluctuation constraint, the energy storage power is controlled through a droop regulation way to enable the target variation rate to be stabilized within an expected range; and meanwhile, an SOC feedback and regulation mechanism is added, and the SOC is regulated in a set range. By virtue of the real-time photovoltaic power station power fluctuation stabilizing method, the power fluctuation stabilizing effect is improved while the energy storage service life is prolonged, and certain superiority is achieved.