The invention provides a photovoltaic super-short-term generated power forecasting method based on cloud cover simulation. The method comprises the following steps that photovoltaic super-short-term generated power of a photovoltaic power station in the next four hours is forecasted according to a weather-type cloudless sky forecasting method; cloud cover information of the photovoltaic power station in the next four hours is simulated, forecasted data correction is carried out for horizontal plane irradiance attenuation caused by cloud, and forecasting of the photovoltaic super-short-term generated power of the photovoltaic power station is finished. The forecasting method has the greater advantages on the aspect of capturing the cloud cover shading information than a cloudless sky working condition photovoltaic power super-short-term forecasting model, and the effective time duration is greatly prolonged compared with that forecasted by a photovoltaic power super-short-term forecasting model based on a foundation cloud picture.