The invention discloses a peak shaving method for large-scale new energy grid-connected power generation. The method comprises the steps of establishing a large-scale new energy grid-connected peak shaving model and analyzing a peak shaving notch based on the established large-scale new energy grid-connected peak shaving model. By means of the peak shaving method for large-scale new energy grid-connected power generation, the defects of large investment, low new energy utilization rate, high power grid loss and the like in the prior art can be overcome, and the advantages of small investment, high new energy utilization rate and low power grid loss can be achieved.