The invention discloses a day-ahead peak regulation optimization control method for a photo-thermal power station with a high-proportion wind power access power grid in the field of power grid peak regulation control. The method comprises the following steps: reading related information of various power supplies and loads; calculating active output plans of various power supplies and loads; dividing peak regulation periods according to different power grid peak regulation requirements; respectively establishing a photo-thermal 'down-regulation peak' model and a 'up-regulation peak' model in different peak regulation periods; and solving the model to obtain an adjustment plan of the photo-thermal unit. The invention provides a day-ahead peak regulation optimization control method for a photo-thermal power station with the high-proportion wind power access power grid, and the method improves the peak regulation capability of a system through the coordinated dispatching of the photo-thermal power station, thereby promoting the consumption of wind power.